Orb wins 139th Kentucky Derby on a late charge . Orb 's co-owner Stuart Janney gave McGaughey the credit , noting that many had been saying his time to win the Derby had come . Track at Churchill Downs was sloppy because of rain . - The first horse to win the Triple Crown since Affirmed in 1978 is American Pharoah who won the Belmont Stakes and then went on to become Horse of the Year for 1978.
Orb wins 139th Kentucky Derby on a late charge . Track at Churchill Downs was sloppy because of rain . - The first horse to win the Triple Crown since Affirmed in 1978 is American Pharoah who won the Belmont Stakes and then went on to become Horse of the Year for 1978.