Racing Photo Gallery

FILE - This Nov. 6, 2010, file photo shows John Velazquez riding Uncle Mo to victory during the Juvenile race at the Breeder's Cup horse races at Churchill Downs, in Louisville, Ky. Todd Pletcher knows a champion when he sees one, and the nation's leading trainer says Uncle Mo has the potential to be among the all-time greats if he continues "doing what he's been doing." (AP Photo/David J. Phillip, File)