Failed post-race drug test confirmed for Derby 147 winner Medina Spirit, Churchill Downs imposes 2 year ban on Baffert Churchill Downs announced they are suspending Bob Baffert-trained horses from racing at the track for two years but no official decision on Derby disqualification. LOUISVILLE, Ky. According to a statement from trainer Bob Bafferts attorney, Craig Robertson, Kentucky Derby 147 winner Medina Spirits positive post-race drug test was confirmed. The horse tested positive for Failed post-race drug test confirmed for Derby 147 winner Medina Spirit, Churchill Downs imposes 2 year ban on Baffert