Sam Claphan played on the 1974 and 1975 National Championship teams. He was the starting lineman for the Oklahoma Sooners from 1975-1978. At 6' 7" and 295 lbs, Claphan was the largest player on the team. He was drafted in the second round of the 1979 NFL Draft (47th overall pick) by the Cleveland Browns but failed to make the roster do to a preseason injury. He was picked up by the San Diego Chargers in 1980.