Summer Bird won the 2009 Belmont Stakes, the third leg of the U.S. Triple Crown, in which Kentucky Derby winner and Preakness Stakes runner-up Mine That Bird was favored. The win was the second of his five-start career, and followed a third in the Arkansas Derby and a sixth in the Kentucky Derby. After the Belmont, he was sent to Monmouth Park, New Jersey to prep for the Haskell Invitational. He finished second in that race to champion female Rachel Alexandra.