A pair of classic sports cards of one of the greatest two-sport stars of all time, Bo Jackson. On the left is a 1989 ProSet football card of Jackson as a Los Angeles Raider, on the right a 1987 Donruss baseball card of Jackson during his days as an outfielder for the Kansas City Royals. Jackson is the only pro athlete to be named an All Star in two major sports. He won the Heisman Trophy at Auburn and then focused on playing both sports in the pros, starring for the Royals, and the Raiders for four years before a major hip injury ended his football playing days. He then turned full time to baseball, although the Royals released him rather than pay him while he rehabbed his football injury. He played two more years for the Chicago White Sox.