Quiet Resolve, Canada's Horse of the Year in year 2000, has been retired after suffering a leg injury during preparations for the $100,000 Labeeb Stakes at Woodbine on Sunday.Hugh Chatman, assistant to trainer Mark Frostad, confirmed that the 7-year-old Affirmed gelding was sent to the University of Guelph Equine Hospital after taking a bad step and breaking his back left leg following a routine gallop on Thursday morning."He is now retired," Chatman said. "He took a funny step after a routine gallop. He went to Guelph and the surgery went well. He'll (eventually) go up to (owner Sam-Son Farm's facility) in Milton to be with his buddies like (veteran campaigner) Desert Waves."Quiet Resolve burst into prominence in 1999 when he was the put-up winner of the grade I Atto Mile at Woodbine following the disqualification of Hawksley Hill.He proceeded to win two stakes races, the Dixie Stakes (gr. II) and the Hong Kong Jockey Club Trophy Stakes (gr. II) before finishing second to Kalanisi in the Breeders' Cup Turf (gr. IT) at Churchill Downs en route to his Sovereign Award championship in 2000.He captured the 2001 King Edward Breeders' Cup (gr. II) as well as the Connaught Cup (gr. III) at Woodbine earlier this year.The chestnut Ontario-bred retires with 10 wins, six seconds and four thirds in 31 starts for earnings of $2.34 million.