He Won and Lost the Kentucky Derby. He Can’t Stop Watching the Replay.

The New York Times Sports department is revisiting the subjects of some compelling articles from the last year or so. Here is our May report on the Kentucky Derby disqualification of Maximum Security.

Luis Saez has watched the replay too many times. He has watched it with the Hall of Fame riders he competes against daily; with the horse trainers who employ him; alone at night at his home in New York.

The video dates to the first Saturday in May, and Saez is turning for home on a colt named Maximum Security, looking to all the world to be the clear winner of the 145th running of the Kentucky Derby.

He crosses the finish line first. He remembers his heart leaping out of his chest, his hand rubbing his champion colt. Now, all Saez has to do is get the colt to the winner’s circle. He needs to make space for the blanket of roses that comes with winning America’s most famous race.

The colt’s trainer, Jason Servis, is standing on a wet track turned as gooey as peanut butter and is barely able to speak.

“I had just given that colt the ride of my life,” said Saez, 27, “and no one was celebrating.”

Soon, he discovered why. Two of his rivals had claimed that Maximum Security had interfered with their horses down the stretch. It did appear the colt jumped a puddle on the rain-soaked track while turning for home. Saez had felt Maximum Security drift to the right, but he squared the colt’s shoulders quickly and they finished nearly two lengths ahead of their nearest challenger.

Suddenly, the world was introduced to the pioneers of video review in sports: racing stewards. Saez watched the replay of the race and saw why Maximum Security got spooked. Tyler Gaffalione, aboard War of Will, tried to shoot through a hole that was not there. Gaffalione’s colt got tangled with Maximum Security, and Gaffalione was nearly thrown.

For the next 22 minutes, Saez’s actions in the stretch were replayed and dissected, by the more than 150,000 people at Churchill Downs, the millions more watching on national television and, most important, the three stewards sitting in a dark room atop the clubhouse.

“He ran up on my horse,” Saez told himself. “There was no way they were going to take me down.”

Saez was wrong. The stewards determined that Maximum Security had interfered with other horses. The runner-up, Country House, a 65-1 shot, was declared the winner. Instead of notching a career achievement, Saez became the rider of the only Derby winner to be disqualified for interference.

“That’s horse racing,” said Maximum Security’s owner, Gary West, as he was leaving the winner’s circle. “Sometimes you win. Sometimes you lose. Sometimes you win and you lose all in the same race.”

By the next morning, West had changed his tune. He filed an appeal with Kentucky horse racing officials. It was denied. In the months since, West has unsuccessfully pursued a reversal in the courts.

On the first Saturday of December, after Maximum Security won the prestigious Cigar Mile at Aqueduct, Servis, too, could not hide his disappointment.

It didn’t matter that his colt has won seven of nine races for more than $1.8 million in earnings. He would trade them all for the feeling he had when Maximum Security had seemingly delivered him his first Derby victory.

“I’ve got to hold back tears,” Servis told reporters afterward. “He’s special, that horse. It’s just a shame because he was the best horse in the Derby.”

Saez was suspended for 15 days for failing to control his mount. He has appealed the penalty, so he has not had to serve that suspension yet. In June, New York regulators suspended him for seven days for a bumping incident at Belmont Park.

Saez is trying to put the hurt behind.

At first, he worried that the disqualification would hurt his business. It hasn’t — he is in seventh place in the national jockey standings with nearly $18 million in purse earnings.

Besides, Saez knows what real grief feels like.

In 2014, his brother Juan died after a spill in a race at Indiana Grand Racing & Casino. He was just 17 and had followed Luis to the famed Laffit Pincay Jr. Technical Jockey Training Academy in their native Panama. Juan then followed Luis to America.

At the time of his death, Juan had won 90 races in just four months and was one of the nation’s top apprentice riders. Luis was home in Panama to surprise his father on his birthday when the accident occurred.

He got the call about his brother. He delivered the news to his parents.

Saez knows how dangerous riding a 1,100-pound horse at 35 miles per hour can be. He knows how blessed he is to have the talent that will probably land him in the Hall of Fame. He also knows how quickly it can be taken away — something he says that he thinks about each time he walks through his door and sees his three young daughters.

He says Maximum Security is the best horse he has been on. He knows that they won the 145th running of the Kentucky Derby together.

“Maybe there is another Derby winner out there for me,” he said. “Until then, every day, I get up, hold my head high and work hard. Let’s see what God’s plan is for me.”