Hall of Fame jockey Kent Desormeaux was taken to the hospital after being unseated during the post parade and getting kicked in the chest before a race at Santa Anita on Sunday.
The 42-year-old rider had three wins on Sunday's card before the incident ahead of the eighth race.
Desormeaux was aboard 2-year-old filly She's a Big Winner, who was entered in her first race, when she reared and unseated him. He got up and while trying to remount he was kicked by the filly's hind leg, sending him reeling backward about 10 feet.
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Desormeaux has found success since returning to Southern California to ride full-time in May.