Mr. Bowling and Mark Valeski: Jockey Cam road to the Kentucky Derby HD

Archive footage that has never been released until now 2012 Kentucky Derby contenders Mr. Bowling and Mark Valeski are both trained by Larry Jones and both owned by Brereton Jones. They worked 5 furlongs at Keeneland racecourse on October 25th in 1:00. 3 under jockeys Gabriel Saez and Ramon Vazquez.