Which horse won the 2015 American Triple Crown, ending a 37-year wait?

American Pharoah won the 2015 American Triple Crown, ending a 37-year wait for a horse to sweep the Kentucky Derby, Preakness Stakes, and Belmont Stakes.

The bay colt was bred in Kentucky and trained by Bob Baffert. With jockey Victor Espinoza, he won the Kentucky Derby at Churchill Downs and the Preakness Stakes at Pimlico before completing the sweep in the Belmont Stakes at Belmont Park.

His Belmont victory was especially significant because the previous Triple Crown winner had been Affirmed in 1978. Several highly regarded horses came close during the gap, including Spectacular Bid, Silver Charm, and California Chrome, but none won all three races.

American Pharoah also became the first horse to win the modern Grand Slam of Thoroughbred racing by adding the Breeders' Cup Classic later in 2015. His name is intentionally spelled “Pharoah,” rather than the standard “pharaoh.”