Jockey Frankie Dettori rode his sixth straight winning horse Saturday night at Santa Anita, California.
The cumulative odds of winning were more than 77,000 to 1.
Dettori famously rode the card's all-winner 'Magnificent Seven' at odds of more than 25,000 to 1 at Ascot in August 1996.
“I love this place and to be able to say on Derby day that I won six races is a dream come true,” said the 53-year-old Italian.
“I don't know how to put it into words. Is this real? Am I dreaming? Is this really happening? It's unbelievable. I don't know what to say.”
Dettori has long been based in the UK and has ridden more than 3,300 winning horses in his career, but last year he postponed his retirement plans to ride in the United States.
His six winners came at odds of 9-4, 6-1, 12-1, 9-2, 10-1, and 10-3.
His biggest success came in the Grade 2 Santa Anita Oaks, ridden by 10-1 Nothing Like You, but with all six wins already decided, he finished 5-4 in the Grade 1 Santa Anita Derby. He only finished second to the defeated popular horse Imagination.
“He's just a phenomenon,” Nothing Like You trainer Bob Baffert said of Dettori. “He is world class and has shown his talent on every stage.”
The record for most wins by a jockey on a single card in the United States was set in 2005 by Eddie Castro, who won nine of his 11 mounts.
The record for most wins in a single event by a Santa Anita jockey is Laffite Pinkay Jr.'s seven wins in March 1987.