Medina Spirit, ridden by jockey John Velazquez, leads the field during the Kentucky Derby in Louisville on May 1. On Sunday, trainer Bob Baffert revealed the Derby winner had failed a drug test.

LOUISVILLE, KENTUCKY – MAY 01: Medina Spirit #8, ridden by jockey John Velazquez, leads the field to the first turn during the 147th running of the Kentucky Derby at Churchill Downs on May 01, 2021 in Louisville, Kentucky. (Photo by Sarah Stier/Getty Images)