Shackleford is a 15 year old horse that was born in 2008 and raced from 2010 to 2012. He was sired by Forestry out of the Unbridled mare Oatsee. He was trained by Dale L. Romans and raced for Michael Lauffer, W. D. Cubbedge, and was bred in Kentucky, United States by W. D. Cubbedge, Michael Lauffer. Shackleford has raced at Aqueduct, Belmont Park, Churchill Downs, Gulfstream Park, Hoosier Park, Keeneland, Monmouth Park, Pimlico Race Course, Santa Anita Park, Saratoga with wins at Belmont Park, Churchill Downs, Gulfstream Park, Pimlico Race Course. His stakes wins include wins in the 2012 Clark Stakes (G1), 2012 Metropolitan (G1), 2012 Churchill Downs Stakes (G2), and the 2011 Preakness Stakes (G1).