Kentucky Derby winner Orb enters the track at Belmont Park for a light workout, Tuesday, June 4, 2013 in Elmont, N.Y. Orb is entered in Saturday's Belmont Stakes horse race. (AP Photo/Mark Lennihan)
Kentucky Derby winner Orb munches on hay in his stall in Barn 41 at Churchill Downs, Sunday, May 5, 2013, in Louisville, Ky. (AP Photo/Garry Jones)
Joel Rosario rides Orb reacts after the 139th Kentucky Derby at Churchill Downs Saturday, May 4, 2013, in Louisville, Ky. (AP Photo/Darron Cummings)