Longtime jockey Richard Gamez has died after he suffered devastating injuries in a fall from his horse during a race Sunday at a famous Arizona track.
The 66-year-old was reportedly in the lead at Rillito Park Racetrack in the Tucson area when his horse suddenly bucked him from his saddle.
Gamez hit the ground ... and after he was trampled by another horse -- he was rushed to the hospital with serious injuries.
On Monday, track officials announced Gamez had died ... and in an interview with the Arizona Daily Star, a track spokesperson said the injuries were catastrophic.