SARATOGA SPRINGS, N.Y. -- Arguably the best older horse in training, Mindframe (Constitution), went back to work Friday morning. The 4-year-old colt had his first work since winning the loaded GI Stephen Foster Stakes last month for Hall of Fame trainer Todd Pletcher. Mindframe worked an easy four furlongs in :52.46 (76/78) on the main track with regular exercise rider Carlos Quevedo on board. "He does whatever you ask him to do," Pletcher said outside his barn at the Oklahoma Training Track. "He is cool that way. He goes easy...