William Casey Weldon (born February 3, 1969 in Americus, Georgia) is a former professional American football player. Weldon is best known for being the quarterback for Florida State in the late-1980s and early-1990s. During his senior season in 1991, Weldon finished runner-up in the Heisman Trophy balloting to Desmond Howard of Michigan. He also played in the National Football League, World League and for the Birmingham Thunderbolts of the XFL.