Probation Ready came from off the pace to win the $75,000 Black Gold Stakes under a patient ride from Robby Albarado.
The race was originally carded for 5 1/2 furlongs on the turf but was switched to the main track, which was sloppy after heavy rain.
Albarado allowed the 4-5 favorite to settle early as Tainted Money sprinted clear of the field in a 22.47 quarter.
"I figured he'd have some pace in the race, and he did," said Albarado.