At the Canadian Triple Crown of Thoroughbred Racing, Contreras was the 2011 Canadian Triple Crown winner with his wins at the Queen's Plate, Prince of Wales Stakes and Breeders' Stakes. With Inglorious and Pender Harbour, Contreras was the first jockey to use two horses to win the Canadian Triple Crown. In 2014, Contreras re-won the Breeders' Stakes after having top three finishes at the Queen's Plate and Prince of Wales. During the 2016 Triple Crown, Contreras was the winner at the Prince of Wales and the runner-up at the Queen's Plate.
