The unidentified man received $20,000 to settle a claim he was cheated when the winning horse tested positive for performance-enhancing drugs.
The colt, named after coronavirus task force expert Dr. Anthony Fauci, took on the neigh-sayers for opening day.
The Kentucky Turtle Derby will feature thoroughbreds like Sir-Hides-A-Bunch, American Toruga and Galapa-GO! in the field.
Famed trainer Jason Servis is among those accused of doping his horses, including Maximum Security, who briefly won last year’s Kentucky Derby.
Dozens of racehorses died at the southern California racetrack in 2019, drawing scrutiny from government officials and animal rights activists.
Golden Birthday was the 39th horse to die at the embattled California park in a little more than a year.
Truest Reward died during training just days before the racetrack's winter-spring meeting opening day.
Hall of Fame trainer Jerry Hollendorfer, whose horse Mighty Elijah died on Saturday, has been banned from other parks due to safety concerns.
Mongolian Groom suffered a fatal injury during the $6 million race at the California track on Saturday. It was the 37th equine death at Santa Anita since December.
Bye Bye Beautiful was euthanized after injuring her legs during a race. She's the second fatality in three days.