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Four years ago, the man associated with speed more than any track and field coach in the world felt himself slowing down, and he did not know why.

Since he was born in Panama in 1954 to a Panamanian mother and U.S. Navy father, Bobby Kersee has always been restless, a self-described wanderer with energy that matched his athletes. But in 2019, feeling unusually sapped, he called his doctor in St. Louis. Blood tests produced results dangerously far beyond the norm. Pancreatitis kept him stuck in a hospital for four weeks.

Once discharged, Kersee gave up red meat and alcohol.

What he would not quit was track.

Forty years after coaching his first world champion Kersee, now 69, paced relentlessly for four hours on Thursday while watching his training group at West Los Angeles College.

“Everyone kind of says the same thing: You know, he's different in terms of he's basically a mad scientist,” said Athing Mu, the 20-year-old reigning Olympic and world champion at 800 meters who switched to Kersee’s coaching in September to expand her range. “He knows what he's doing.”

Under cloudy skies at the track high above Culver City, nine athletes in his training group, dubbed Formula Kersee, ran tailored workouts and waited for his every word, from the barked “let’s go!” to commands about mechanics he hollered to athletes mid-run. He lifted hurdles, held court with reporters and stopped only to film block starts with his iPhone.

At an age when he might have become anachronistic, Kersee and his methods still represent sprinting’s gold standard, associates and athletes say. Invigorated by a training group that describes itself as a family and could be dominant into the next decade behind headliners Mu and 23-year-old 400-meter hurdles world champion and world record-holder Sydney McLaughlin-Levrone, Kersee said his career has no discernible finish line.

His coaching, primarily of sprinters and hurdlers, has brought his athletes at least one gold medal in 10 consecutive Summer Olympics, a litany of world championships and world records and, for Kersee, veneration, criticism and influence.

As the first professional meet held at UCLA’s Drake Stadium since 1990, and a key early tentpole in USA Track & Field’s attempted plan to grow its U.S. fanbase before the 2028 L.A. Olympics, this weekend’s Los Angeles Grand Prix is both a callback to a time when track’s popularity soared and, its organizers hope, a harbinger such times can return.

Outside of Sebastian Coe, the 1984 Olympic gold medalist in the 1,500 who has since ascended to lead track’s global governing body, World Athletics, few figures have spanned both eras as prominently as Kersee.

Athletes and associates credit his ability to turn seemingly outlandish goals and times into tangible results to an ability to know what they need. Malachi Davis, who has overseen McLaughlin-Levrone’s training since she turned professional, likened Kersee to a conductor, his whistle and yellow stopwatch replacing a baton to direct “a beautiful dance of confidence and knowledge.”

Many coaches can teach how to run fast and build a race plan, McLaughlin-Levrone said, but Kersee understands “how to break it down piece by piece.”

Robert Forster, a Santa Monica-based physical therapist who has worked with Kersee’s athletes since 1983, said Kersee understands the “work-rest ratio” better than any coach, and does not overtrain where other coaches might double down on mileage. Forster has seen Kersee send an athlete home to rest just from the look on their face, and likes to tell a story about the 2016 Olympics, that Kersee later confirmed. Allyson Felix, the Los Angeles native who under Kersee became the most decorated athlete in track’s history, was nursing a severely sprained ankle and the physical therapist told Kersee it needed to be iced 20 minutes every hour. Forster did not expect, however, that Kersee would stay up the entire next night icing the ankle as Felix slept.

Kersee was an early adopter of technology, upgrading his video cameras at a Westwood electronics store years before he could film block starts of sprinters Jenna Prandini and Morolake Akinosun on his iPhone and zip the footage to an iPad on the infield of the West L.A. track.

Yet the Kersee mystique has endured as much because of his grasp on psychology as biomechanics — feeling for when to push and when to pull back.

Brandon Miller, a top 800-meter hopeful who began working with Kersee in September, has heard other athletes describe Kersee as “crazy.” He disputes that characterization, but noted that Kersee knows to stoke his competitiveness entering a workout’s final repetition with four words: “OK, what you got?”

“I've never met any coach like him,” Mu said. “He's not going to make you do anything that's for his sake. You know, it's gonna be all for you and the benefit of you and your career. And so, I come in here, I knew that he was very intentional, and that's something I needed, especially if I want my career to be long.”

Raised by a grandmother as an “A-train baby” bouncing between the Bronx and Queens, Kersee lost his mother, Daphne, when he was 14, before moving to San Pedro for high school.

He put himself through college at Long Beach State by working at a youth correctional facility in Whittier, where Kersee watched wards from midnight until 8 a.m. After graduating, he had two jobs: Track coach at Cal State Northridge, and counselor at another youth facility in Chino. He took over UCLA’s track and field program in 1980 and that provided enough money to be comfortable. Coaching Greg Foster to his first world championship in 1983, and watching his athletes win six golds and four silvers at the Los Angeles Olympics one year later, provided the final confidence he could sustain coaching as a career.

But he did not leave behind the edge required to do his former jobs.

“I used to work in the prisons, so you can’t walk into the prisons being Mother Teresa,” he said. “And then I did find myself carrying a little bit too much of that to the track. I had to calm myself down and say, 'Wait a minute, you’re not working with a warden.'”

Once, an elderly woman approached Kersee in an airport in Indiana and told him she did not like what she had seen from Kersee or the other famed coach with the B.K. initials: Bobby Knight. He did not belittle his athletes, he said, but he also didn’t leave room for interpretation about who ran the workout. The edge created a mystique that “he's crazy,” Miller said. “But he's not. I feel like everybody has preconceptions of everybody but you won't really know unless you're there and you're with them every day.”

Just as when he built his vaunted World Class Athletic Club in the 1980s, he will only train those he can coach hard and have chemistry. His athletes typically train Monday, Tuesday, Thursday and Friday. He treats Monday Zoom calls with the group as though he is re-interviewing for the job. It’s more convenient than years before, he said, when he recalled gathering before dawn in Europe to address their complaints with him.

“I think we have that understanding that I’m going to listen and respect them,” he said. “But my job is to get the job done for them individually and collectively but you hired me. And if you hired me, let me do my job.”

That job, essentially, can be reduced to one thing: Imparting confidence in his plan. And no one does it like Kersee, said Davis, who sprinted professionally before aiding McLaughlin-Levrone.

“He's a competition coach, so the time it counts, you feel confident,” Davis said. “And your head coach is basically your general and then competition is basically war. And yes, you prepare for war but that final voice, that presence, that action, that essence, that’s Bobby. And he earned that by what he’s accomplished throughout his career.”

Kersee allows that age has softened him. As McLaughlin-Levrone recalled last August, Kersee earned her trust when he saw her overwhelmed with emotion at a 2020 practice and handed her a paper showing a wheel of emotions, saying he had trouble expressing himself, too.

Though accustomed to criticism of himself for years — he joked he would be buried in a track, and "probably as much as people hate me, they’ll put me in lane one, because I’ll be stepped on the most" — he worries about how the inundation of social media affects athletes’ mental health. He has traveled to support the singing ambitions of Formula Kersee sprinter Chloe Abbott. This spring, a smiling Kersee was featured on TikTok when his athletes remade the opening credits of the 1990s sitcom “Family Matters.”

Four decades into his career, he has “a whole lot of knowledge and a whole lot of patience,” he said. “But still, don’t let grandpa get out of the chair.”

Ato Boldon was never coached by Kersee during his sprinting career but has known him for 31 years, since they overlapped at UCLA, and has seen a “golden-hearted” side to the coach. He also described Kersee’s coaching equivalent as either Knight or San Antonio’s Gregg Popovich.

“Everybody under him wins,” said Boldon. “But it’s not necessarily a democracy.

“... As time has gone on, people are like, ‘Wow he’s so this or he’s so that, he’s so abrasive.’ Listen, do you want results, or do you not want results?”

No one argues that Kersee gets results. The most common criticism is how rarely his athletes compete en route to smashing records and claiming gold.

Among athletes, meet directors, agents and track officials who see a need for the sport’s biggest stars and strong competition to draw in casual fans, it has become a question of how to unite what is best for the top athletes’ futures with what is best for the sport’s growth. The tensions surrounding the discussion are not dissimilar from the way “load management” in the NBA has sparked concerns whether it will turn off fans from the regular season.

Because many top athletes train under Kersee, he has become a focal point. There is also his history of pulling athletes late before a meet, sometimes because of injury, and sometimes as a power play, as in 1994, when a dispute over pay led him to withdraw Gail Devers from a high-profile Los Angeles indoor meet.

The topic reignited last week when he withdrew Mu and McLaughlin-Levrone from the Grand Prix, a meet for which he serves as co-promoter. It came soon after telling Track & Field News in February that even he would like to see McLaughlin-Levrone run more often, and told The Times in March that there was no reason meets in the U.S. couldn’t draw thousands if the sport’s leaders banded together to promote strong competitions.

Asked about the balance of what is best for his athletes, or the sport, Kersee this week called it a byproduct of limited sponsorship money within the sport, which incentivizes performances at the biggest meets, which often require qualification earlier in the season. Only a handful of stars make big money and can afford to be choosy. He contrasted it with the NFL and NBA, where athletes can still earn a paycheck while resting.

“I think it’s a little tougher on our athletes to try to balance out wanting to run for the public and run for our sport and also knowing if I run too much or make one little mistake it might cost me making a team,” Kersee said. “That if I go out there and run five or six races I’m going to get to the point of, 'OK why is he running me so much and she gets injured over there, did she really need to run?'”

McLaughlin-Levrone released a statement after being pulled from the Grand Prix field that she “regrettably” would not be competing, citing her coach’s choice. It also said she trusted his judgment, which the world record-holder echoed again Thursday.

“He has a plan and he is going to work it out to perfection,” said Boldon, who will call Saturday’s meet as part of NBC’s broadcast team. “It might not benefit USATF, it might not benefit the fans, but you tell me, what moment stood out most from last summer's world championships?”

It was McLaughlin-Levrone’s stunning 50.68 time to win the 400-meter world title and lower her own world record. The run cut through the noise to make SportsCenter. It also left McLaughlin-Levrone sore for days, she said. Seeing her parents in the stands, for the first time after becoming the first woman to run under 51 seconds, she told them “that hurt, so bad.”

“We've been very calculated in when we run and I think it's yielded us great results,” McLaughlin-Levrone said. “Bobby always uses analogies and he's like, 'You don't take the Ferrari out every day for a drive. You take it out when it needs to come out and it does its things and you put it back in the garage.' So, your body can only be pushed to a certain level so much in your career.

“You only have so many races in your legs and I think we're really strategic about which ones we choose to run. Obviously I know the sport wants to see a little bit more and I think we're trying to figure out how to do that in a safe way that we can still accomplish our goals and give them something to look forward to.”

For McLaughlin-Levrone and Mu, the question is not whether they will make this summer’s world championships in Hungary, or next summer’s Paris Olympics, but which events — possibly plural — they will run.

When Kersee evaluates whether to bring an athlete into his coaching, he also looks for their potential range. He thought he lost his job coaching Felix when he told the 200-meter star during his interview that he would have her run the 400.

Mu and McLaughlin-Levrone’s youth and potential range is one of the sport’s most speculative discussions; news about their upcoming races create instant headlines. The duo are “two of maybe the most talented athletes he’s ever had,” Boldon said.

Their world championships last summer gave McLaughlin-Levrone an automatic berth into the upcoming world 400-hurdle field, and Mu an entry into the 800. With that secured, Kersee has focused on running McLaughlin-Levrone in the open 400 meters, where Marita Koch’s world record of 47.60 has been effectively unapproachable for 38 years — only four women have run even faster than 49 seconds in the past 20 years. She once thought 47.60 was “impossible.” Not anymore.

“It's a very daunting number to look at, I'll tell you that,” McLaughlin-Levrone said. “But at the end of the day, I think if we can take the 400 hurdles to 50.6, I think 47.6 isn't too far off.”

In addition to her 800-meter world title, Mu once owned the collegiate 400-meter record and ran on the U.S. 4x400-meter relay team that won Olympic gold in Tokyo.

“I'm still super young and I have not touched the surface of a lot of things yet,” Mu said. “But I do have visions, which is like really big goals of competing in obviously the Olympics again, and then worlds and hopefully, doubling up.”

Would that mean the 800 and 400, or the 800 and 1,500?

“Hopefully both,” she said. “I mean, I would love to have a chance to do 4/8 and then go ahead and do the 8/15 at some point.”

Maybe this explains why Kersee moved so quickly across the track during practice. There was no sign he had once slowed down.

“I’m glad,” he said, “I have that Energizer Bunny still in me.”

This story originally appeared in Los Angeles Times.

The prospect of seeing one of athletics' biggest stars back on the track is growing stronger, with Jakob Ingebrigtsen reportedly targeting a return to competition later this summer following his recovery from Achilles tendon surgery.

According to comments made by his agent, Daniel Wessfeldt, in an interview with Norwegian media, the double Olympic champion could make his long-awaited comeback at one of three major European meetings in July. The leading options under consideration are the Monaco Diamond League on July 10, the Hungarian Athletics Grand Prix on July 14, and the London Diamond League on July 18.

For athletics fans, the possibility of Ingebrigtsen lining up in London would add another layer of excitement to an already highly anticipated Diamond League meeting. The Norwegian middle-distance sensation has become one of the sport's most dominant figures in recent years, collecting Olympic, world and European titles while consistently rewriting record books.

His 2026 campaign was put on hold after he underwent surgery on his Achilles tendon earlier this year, forcing him to focus on rehabilitation rather than competition. Since then, questions have surrounded when the 24-year-old would be ready to return to racing.

The latest update suggests that decision will largely depend on how his training progresses over the coming weeks. If recovery continues according to plan, July could mark the beginning of his return to elite competition ahead of the latter stages of the season.

A comeback at either Monaco, Budapest or London would immediately place Ingebrigtsen back among the sport's biggest storylines. Each meeting is renowned for producing world-class performances, and any appearance by the Norwegian would attract significant attention from fans eager to see how quickly he can regain top form after his injury setback.

While no final decision has been confirmed, the signs are increasingly positive. After months away from competition, Jakob Ingebrigtsen appears to be edging closer to a return, with London's Diamond League meeting emerging as one of the most intriguing possibilities on his road back to the track.

Should his recovery continue smoothly, athletics could soon welcome back one of its brightest and most influential stars.

What should have been the defining moment of Emad Bashir-Mohammed's young running career instead turned into one of the most talked-about controversies in American road racing this year.

The 23-year-old crossed the finish line first in the men's citizen's race at the prestigious Bolder Boulder 10K on Memorial Day in Colorado, stopping the clock at an impressive 29:50. His performance was not only a commanding victory but also one of the fastest winning times ever recorded in the event's long and celebrated history. Bashir-Mohammed finished eight seconds clear of his nearest challenger and appeared to have secured a breakthrough triumph.

For nearly two hours, he was the undisputed winner.

Then everything changed.

Race officials announced that Bashir-Mohammed had been disqualified after determining that he had started in the wrong wave. According to Bolder Boulder regulations, he had been assigned to the AA wave but lined up with the faster A wave, which began earlier. Event rules allow runners to move backward into a slower wave, but prohibit athletes from advancing into a faster one.

As a result, Bashir-Mohammed's victory was erased from the record books.

The citizen's title was subsequently awarded to Nickolas Scudder, who crossed the line second in 29:58. The promotion handed Scudder back-to-back citizen's race victories, while Bashir-Mohammed was left to grapple with the disappointment of losing a win he believed he had earned on the road.

The disqualification has since ignited widespread debate across the running community.

Bashir-Mohammed maintains that he did not intentionally violate the rules. He claims that after collecting his AA bib, he spoke with race personnel and was permitted to start with the A wave after presenting evidence of his recent performances. In a statement shared after the race, he expressed frustration over the decision, arguing that his goal was simply to compete against the strongest field available and produce the fastest time possible.

Race organizers, however, stood firmly behind their ruling. Officials stated that wave-assignment regulations are clearly communicated in pre-race information and reiterated during packet collection. They also noted that hundreds of participants are disqualified each year for moving into faster start groups, emphasizing that consistent enforcement is necessary to maintain fairness for all competitors.

The incident has divided opinion among runners and fans alike. Some believe the rules must be applied equally regardless of an athlete's finishing position, arguing that wave assignments are a fundamental part of race organization. Others feel the punishment is harsh, particularly if Bashir-Mohammed genuinely received approval to move up before the start.

What remains undisputed is the quality of his performance. On the roads of Boulder, Bashir-Mohammed demonstrated the fitness and speed required to outrun the field by a significant margin. Yet in road racing, crossing the finish line first is only part of the equation. Compliance with race regulations carries equal weight.

For Bashir-Mohammed, the day will be remembered as a painful lesson in the fine margins that can define elite competition. A remarkable run delivered a memorable victory, but a dispute over wave placement ultimately overshadowed the achievement, leaving behind a controversy that continues to fuel discussion throughout the running world.

A fast race, a costly administrative error, and a debate that may linger long after the finish-line tape has been packed away.

The men's 100 metres at the 2026 Rome Diamond League is shaping up to be one of the most anticipated sprint races of the season, with an exceptional field featuring some of the fastest men in the world.

Scheduled for Thursday, June 4, at the iconic Stadio Olimpico in Rome, the race will bring together reigning stars, established champions and emerging talents in a contest that promises fireworks from the moment the gun goes off.

Kenya's Ferdinand Omanyala headlines a world-class lineup that includes American sprint sensation Noah Lyles, Botswana's Olympic champion Letsile Tebogo, Jamaica's explosive Ackeem Blake, South Africa's ever-consistent Akani Simbine and Italy's hometown hero Lamont Marcell Jacobs. With personal bests ranging from 9.77 to 9.97 seconds, the field is packed with athletes capable of producing something special on the Diamond League stage.

Omanyala, the African record holder with a blistering personal best of 9.77 seconds, arrives in Rome eager to continue his strong early-season form and prove he can challenge the very best on the global circuit. The Kenyan star has built a reputation as one of the fastest starters in world sprinting and will be looking to make a statement against an elite field.

Standing in his way is world champion Noah Lyles, whose personal best of 9.79 seconds places him among the fastest athletes in history. The American remains one of the sport's biggest attractions and will be determined to add another Diamond League victory to his impressive résumé.

The race also marks a major test for Olympic champion Letsile Tebogo. The Botswanan star has rapidly become one of athletics' most exciting talents, while Ackeem Blake continues to establish himself as a serious contender on the international sprint scene.

Adding further intrigue is the presence of Italy's Lamont Marcell Jacobs. Competing on home soil, the Tokyo Olympic champion will enjoy passionate local support as he seeks to deliver a memorable performance in front of the Roman crowd.

South Africa's Akani Simbine, Cameroon's Emmanuel Eseme, Great Britain's Jeremiah Azu and rising American talent Jordan Anthony complete a field that boasts remarkable depth and quality.

Men's 100m Entry List – Rome Diamond League 2026

Ferdinand Omanyala (Kenya) – PB: 9.77

Noah Lyles (USA) – PB: 9.79

Lamont Marcell Jacobs (Italy) – PB: 9.80

Akani Simbine (South Africa) – PB: 9.82

Letsile Tebogo (Botswana) – PB: 9.86

Ackeem Blake (Jamaica) – PB: 9.88

Jordan Anthony (USA) – PB: 9.91

Emmanuel Eseme (Cameroon) – PB: 9.96

Jeremiah Azu (Great Britain) – PB: 9.97

With multiple national record holders, global champions and Olympic medal contenders sharing the same start line, the Rome Diamond League men's 100m could deliver one of the fastest races of the year. For sprint fans around the world, all eyes will be on Rome as a stellar cast battles for supremacy over athletics' blue-riband distance.

Audrey Werro announced her arrival as one of the early stars of the 2026 outdoor season with a commanding victory in the women’s 800 metres at the Rabat Diamond League, producing a performance that exceeded even her own expectations.

The Swiss middle-distance talent surged to victory in a brilliant 1:56.56, breaking the meeting record and delivering one of the fastest times recorded worldwide this season. In a race packed with quality, Werro displayed exceptional composure, confidence, and finishing strength to separate herself from the field and stamp her authority on the event.

What made the performance even more remarkable was the athlete's surprise at the level she had already reached so early in the campaign.

"I was not expecting such a strong start to the season," Werro admitted after the race.

The race unfolded at a relentless pace, but Werro remained perfectly positioned throughout. As the athletes approached the bell lap, she glanced at the clock and immediately sensed something special was within reach.

"When I saw the time at the bell, I felt really confident," she said. "I'm really happy with the Meeting Record and looking forward to the rest of the season."

Her confidence proved justified. Maintaining her rhythm over the final 400 metres, Werro powered down the home straight to secure the victory and rewrite the Rabat meeting record books in the process.

The performance sends an early warning to her rivals ahead of a season that promises major championships and high-profile Diamond League battles. Beyond the record-breaking time, Werro's display highlighted her growing maturity as a racer, combining tactical awareness with impressive speed and endurance.

With the outdoor season only beginning, the 1:56.56 clocking suggests that even faster times could be on the horizon. If Rabat is any indication, Audrey Werro may be poised for the biggest season of her career.

Her emphatic victory in Morocco was more than just another Diamond League win—it was a statement of intent from an athlete determined to challenge the world's best throughout 2026.

The city of Boston is set to welcome back one of its most celebrated champions as Kenya’s Sharon Lokedi headlines a world-class field for the 2026 B.A.A. 10K presented by Mass General Brigham Cancer Institute on June 21.

Fresh from another remarkable victory at the Boston Marathon in April, Lokedi returns to the streets of Boston and Cambridge carrying both momentum and confidence as she aims to defend the title she captured in dominant fashion last year.

The two-time Boston Marathon champion has developed a special connection with the historic race city. In 2025, she produced a course-record performance of 2:17:22 to win the Boston Marathon before returning this year to claim another victory in 2:18:51, the second-fastest winning time in the event’s storied history. Her success has cemented her status as one of the premier road runners in the world.

Lokedi will be making her first competitive appearance since her marathon triumph and arrives as the reigning B.A.A. 10K champion after clocking 31:39 over the challenging 6.2-mile course in 2025.

“Boston has become a very special place for me,” Lokedi said ahead of the race. “The atmosphere created by the fans and the community is unlike anywhere else. I’m excited to return and give everything I have to defend my title.”

The women’s race promises to be highly competitive. American Olympian Rachel Smith, who finished second at the Boston 5K in April, leads the domestic challenge. Kenya’s strong contingent includes African 10,000m champion Gladys Kwamboka, former B.A.A. 10K runner-up Stacy Ndiwa, and experienced road racer Viola Cheptoo. British Olympian Jessica Warner-Judd adds further international depth to a field packed with proven performers.

The men’s race is equally impressive, featuring elite athletes from 13 nations.

Ethiopia’s Dawit Seare enters as one of the leading contenders after capturing the 2025 Boston 5K title and bringing the fastest 10K personal best in the field at 27:21. Kenya will be represented by an accomplished group led by Alexander Mutiso, winner of the 2024 London Marathon and runner-up at last year’s New York City Marathon.

Patrick Kiprop also arrives in outstanding form after securing victory at the prestigious BolderBoulder 10K on Memorial Day, while Alex Masai returns looking to continue his strong record in Boston. Masai recently finished ninth at the Boston Marathon and has earned three top-ten finishes at the B.A.A. 10K.

Among the international stars making their mark is South Africa’s Adriaan Wildschutt, who makes his race debut after an impressive season highlighted by victory at the NYC Half Marathon in 59:30. Ethiopia’s Olympic bronze medallist Hagos Gebrhiwet adds further quality to the field, bringing a wealth of championship experience and previous success in Boston.

Canadian national 10K champion Andrew Alexander, two-time U.S. Olympian Hillary Bor, marathon standout Ryan Ford, and reigning USA 25K champion Andrew Colley complete a field stacked with talent and depth.

With defending champions, Olympic finalists, national champions and rising stars all converging on Boston, the 2026 B.A.A. 10K is shaping up to be one of the most competitive editions in recent memory. For Sharon Lokedi, however, the mission is simple: return to the city where she has repeatedly excelled and add another memorable chapter to her growing Boston legacy.