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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.

Ethiopia’s Fotyеn Tesfay Haylu delivered one of the most remarkable women’s half-marathon performances ever seen on American soil on Sunday, powering to a commanding victory at the 2026 Buenos Aires Half Marathon in Argentina in 1:03:57.

Running with exceptional confidence and strength, Tesfay took control of the race and produced a superb solo performance to rewrite the event record. Her breathtaking run also carried historic significance, as she became the first woman to break the 64-minute barrier for the half marathon in the Americas, producing what is being celebrated as the fastest women’s half-marathon performance ever recorded on the continent.

The Ethiopian star was in a class of her own, crossing the finish line more than a minute clear of Turkey’s Nevin Can, who finished second in 1:05:06. Another Turkish athlete, Selin Can, completed the podium in third place with 1:05:11, as the leading trio all produced strong performances on the fast streets of Buenos Aires.

Kenya also featured prominently in the top positions, with Irene Jepchumba Kimais taking fourth in 1:06:04, followed by Sheila Chepkirui in fifth with 1:06:13. Magaret Akidor Ngathike finished sixth in 1:06:46, while fellow Kenyan Deborah Samum claimed seventh place in 1:08:32.

Brazil’s Nubia de Oliveira Silva was eighth in 1:11:13, while Argentina’s Sofia Luna and Dahyana Juarez rounded out the top 10 with times of 1:11:21 and 1:11:28, respectively.

Top 10 Women – 2026 Buenos Aires Half Marathon

1. Fotyеn Tesfay Haylu (Ethiopia) – 1:03:57

2. Nevin Can (Turkey) – 1:05:06

3. Selin Can (Turkey) – 1:05:11

4. Irene Jepchumba Kimais (Kenya) – 1:06:04

5. Sheila Chepkirui (Kenya) – 1:06:13

6. Magaret Akidor Ngathike (Kenya) – 1:06:46

7. Deborah Samum (Kenya) – 1:08:32

8. Nubia de Oliveira Silva (Brazil) – 1:11:13

9. Sofia Luna (Argentina) – 1:11:21

10. Dahyana Juarez (Argentina) – 1:11:28

For Tesfay, it was far more than a race victory. Her 1:03:57 performance was a statement of extraordinary quality, combining speed, endurance and remarkable solo running to produce a landmark result in Buenos Aires. In a race that will be remembered for years to come, the Ethiopian did not simply win—she redefined what was thought possible for women’s half-marathon running in the Americas.

Ethiopia’s Yomif Kejelcha produced one of the most extraordinary performances in road racing history on the streets of Buenos Aires, Argentina, reclaiming the half marathon world record with a sensational 56:51 performance at the 2026 Buenos Aires Half Marathon.

The former world record-holder delivered a breathtaking exhibition of speed and endurance to take 29 seconds off the previous pending mark of 57:20, set by Uganda’s Jacob Kiplimo and takes a huge chunk from his own former official world record. Kejelcha's new performance is pending the standard ratification procedures, but if officially ratified, it will return the world record to the Ethiopian star and mark another remarkable chapter in the evolution of the event. 

Kejelcha's achievement is particularly significant because the 57-minute barrier had already been broken before. Jacob Kiplimo had previously run under 57 minutes, clocking 56:42 that was not ratified demonstrating that the once-unthinkable barrier was possible. Kejelcha, however, has become the second man to run under 57-minute barrier who now returns to the top of the all-time rankings with another historic performance in Buenos Aires.

The Ethiopian's race was remarkable not only for the final time but also for the way he built his performance. He covered the opening five kilometres in 13:44 before reaching 10km in 27:18. Rather than slowing, Kejelcha accelerated through the middle stages, passing 15km in 40:39 and 20km in 54:02 as he continued to push the limits of elite road racing.

By the time he reached the finish line, Kejelcha had completed the race at an extraordinary average pace of approximately 2:42 per kilometre, producing one of the most astonishing sustained efforts ever witnessed in distance running. His stunning run sent a powerful message to the athletics world and further strengthened his status as one of the most formidable distance runners of his generation.

Behind the record-breaking champion, Ethiopia completed a dominant clean sweep of the men's podium. Tadese Worku Gebresilase claimed second place in 59:18, while Bereket Nega Batebo secured third in 1:00:17, giving Ethiopia a memorable one-two-three finish in the Argentine capital.

Kenya’s Jonathan Kipkoech Kamosong finished fourth in 1:00:20, followed by compatriot Simon Maywa in fifth with 1:00:55. Argentina’s Ignacio Erario gave the home supporters plenty to celebrate with an impressive sixth-place finish in 1:00:57, breaking the one-hour barrier in front of an enthusiastic local crowd.

Dillon Kipyeko of Kenya finished seventh in 1:01:07, with Robert Kiprop Koech eighth in 1:02:01. Mexico’s Julio Ortiz Ponce took ninth place in 1:03:17, while Colombia’s Jimmy Gómez completed the top 10 in 1:03:34.

The Buenos Aires Half Marathon will now take its place in the history books as the scene of a truly extraordinary breakthrough. For Kejelcha, this was more than just another victory. It was a spectacular return to the top, reclaiming a world record he had previously held and once again rewriting the limits of the half marathon.

The 56:51 performance remains pending ratification, but Yomif Kejelcha's run has already delivered one of the defining moments in the history of road racing.

Kenya delivered another commanding display of distance-running excellence at the Antrim Coast Half Marathon, with Isaia Lasoi leading a memorable Kenyan clean sweep of the men's podium in a race packed with world-class performances.

Lasoi emerged victorious after a thrilling battle at the front, crossing the finish line in a superb 58:26 setting a new course record. His winning performance underlined his strength and speed over the half-marathon distance, but he was made to work all the way by fellow Kenyan Daniel Mateiko, who finished just three seconds behind in 58:29 after an electrifying duel for the title.

The contest between the two leaders produced one of the standout moments of the race, with both athletes pushing deep into elite territory as they fought for victory. In the end, Lasoi found just enough to secure the win, while Mateiko's narrow defeat highlighted the remarkable depth and quality of Kenya's leading distance runners.

Vincent Kipkorir completed the Kenyan sweep, taking third place in 1:00:38 to ensure that all three places on the podium belonged to Kenyan athletes. Samwel Chebolei added further Kenyan strength to the results, finishing fourth in 1:01:01, while Amos Langat was also among the leading finishers.

The international field featured several prominent names. Australia's Jimmy Whelan produced a strong run, while Ethiopia's Yismaw Dillu featured among the front group. American marathon star Galen Rupp also delivered a notable performance, clocking 1:01:29 in another competitive outing for the experienced distance runner. Former world-class track and road athlete Edward Cheserek was also among the top finishers.

Lasoi's 58:26 victory, however, was the defining performance of the day. Together with Mateiko and Kipkorir, he gave Kenya a perfect podium and another emphatic reminder of the country's extraordinary strength in elite road running.

The Antrim Coast Half Marathon once again provided a fast, competitive stage for some of the world's finest distance runners, but when the decisive moments arrived, it was Kenya that owned the podium.

One of the most iconic milestones in the history of ultramarathon running is drawing closer, with entries for the historic 100th edition of the Comrades Marathon set to open on Tuesday, 25 August 2026.

The Comrades Marathon Association has officially announced a detailed entry process for the 2027 race, which will unfold in three stages and give runners around the world the opportunity to secure their place in what promises to be one of the most significant editions ever held of The Ultimate Human Race.

The announcement followed the official launch of the 2027 Comrades Marathon on Wednesday, 19 August, when the centenary campaign, “The Greatest Story Ever Run,” was unveiled alongside a special logo created exclusively for the landmark 100th edition.

The launch also revealed several major highlights for the Centenary Race. The historic event will take place on Sunday, 13 June 2027, and will be a Down Run, with 28,000 places available. The entry process will include a ballot, while the race will offer a record R8.919 million in prize money. Organisers have also set an ambitious goal of raising R10 million for the Amabeadibeadi charities, adding an important charitable dimension to the centenary celebrations. One of the defining moments of the launch was the unveiling of the special Centenary mark, created to commemorate this extraordinary milestone in the history of the race.

The entry process begins on 25 August at 10:00 a.m. SAST, when entries open for Green Number runners, Yellow Number runners and Amabeadibeadi charity entrants.

The next phase follows on 2 September at 10:00 a.m. SAST, when entries open for Comrades Marathon Association members. This window will remain open for 72 hours or until the available entry allocation is filled, with places offered on a strictly first-come, first-served basis.

For general entrants, the process will move to a ballot system. General entries open on 9 September at 10:00 a.m. SAST, with runners able to enter the ballot until it closes on 22 September at 4:30 p.m. SAST. The ballot draw is then scheduled to take place on 23 September.

Several other crucial dates will shape the road to the historic race. The substitution period will run from 15 to 31 March 2027, while 3 May 2027 is the final deadline for runners to submit their qualifying performances, seeding information and other required entry details.

To qualify for the 2027 Comrades Marathon, runners must complete a 42.2km marathon in under five hours between 15 June 2026 and 3 May 2027.

The journey will finally culminate on Sunday, 13 June 2027, when thousands of runners are expected to line up for the historic 100th edition of the Comrades Marathon.

The 2027 race will represent a remarkable moment for the legendary South African ultramarathon. For more than a century, the Comrades Marathon has captured the imagination of runners and spectators with its extraordinary test of endurance, determination and human spirit. Its centenary edition will celebrate the generations of athletes who have faced its demanding roads, conquered its challenges and helped build one of the world's most respected endurance events.

For runners dreaming of becoming part of this historic occasion, the road to Comrades 2027 is now clearly marked. From the opening of entries in August 2026 to race day in June 2027, every deadline will matter.

The Greatest Story Ever Run is preparing for its most historic chapter yet.

American sprint standout Sam Blaskowski is taking steps toward an international future with Poland after uncovering a powerful connection to his family's ancestral homeland.

The 23-year-old sprinter, who has established himself as one of the fastest Americans of his generation with a personal best of 9.89 seconds in the 100 metres, has begun the process of obtaining Polish citizenship with the aim of eventually representing Poland in international competition.

Blaskowski's connection to the country traces back through his great-grandparents, Franciszek and Julian Błaszkowski, who emigrated from Poland to the United States in 1905. Their journey more than a century ago has now opened an unexpected new chapter for their descendant, whose athletic ambitions could soon carry the Błaszkowski name back onto the international stage under Polish colours.

The sprinter has already received support from the Polish Athletics Association as he works through the citizenship and eligibility process. Should his transfer of allegiance be completed, Blaskowski could become a significant addition to Poland's sprint programme.

His credentials certainly make the prospect an exciting one. In addition to his sub-10-second speed over 100 metres, Blaskowski owns a personal best of 19.93 seconds in the 200 metres, demonstrating the kind of versatility that could prove valuable both individually and in Poland's 4x100m relay squad.

For Blaskowski, however, the move is about more than simply changing national colours. It represents an opportunity to reconnect with his family's heritage while pursuing his ambitions at the highest level of the sport.

With his sights set on becoming part of Poland's international sprint team and competing for relay medals, Blaskowski's journey from discovering his Polish roots to potentially representing the country of his ancestors could become one of the most fascinating allegiance stories in world athletics.

A century after Franciszek and Julian Błaszkowski left Poland for America, their family's story may now be coming full circle—this time at full sprint.