Tacitus is taken for a workout at the Breeders' Cup World Championship horse races at Keeneland Race Course Thursday, Nov. 5, 2020, in Lexington, Ky. Tacitus is scheduled to run in the Breeders' Cup Classic race Saturday. (AP Photo/Mark Humphrey)

FILE - In this May 1, 2019, file photo, trainer Bob Baffert watches his Kentucky Derby entrant Game Winner during a workout at Churchill Downs in Louisville, Ky. Two-time Triple Crown-winning trainer Bob Baffert, who has had multiple horses test positive in post-race drug testing, is taking steps to “do better,” including hiring outside oversight. Baffert said in a statement Wednesday, Nov. 4, 2020, that he is “very aware” of the incidents involving his horses and the impact that it's had on his family, the sport and himself. (AP Photo/Charlie Riedel)

Kentucky Derby winner Authentic is taken for a workout at the Breeders' Cup World Championship horse races at Keeneland Race Course Thursday, Nov. 5, 2020, in Lexington, Ky. Authentic is scheduled to run in the Breeders' Cup Classic race Saturday. (AP Photo/Mark Humphrey)

Belmont Stakes winner Tiz the Law is taken for a workout at the Breeders' Cup World Championship horse races at Keeneland Race Course Thursday, Nov. 5, 2020, in Lexington, Ky. Tiz the Law is scheduled to run in the Breeders' Cup Classic race Saturday. (AP Photo/Mark Humphrey)

Kentucky Derby winner Authentic is taken for a workout at the Breeders' Cup World Championship horse races at Keeneland Race Course Thursday, Nov. 5, 2020, in Lexington, Ky. Authentic is scheduled to run in the Breeders' Cup Classic race Saturday. (AP Photo/Mark Humphrey)