He played college football for the Clemson Tigers, where he was twice named ACC Player of the Year, and was selected by the Kansas City Chiefs in the first round of the 1979 NFL draft.

[2] He was a member of the Sigma Alpha Epsilon fraternity,[3] Fuller was a football and academic All-America at Clemson University.

[2] He played in the National Football League for seven years, most notably with the Chicago Bears as their backup quarterback from 1984 to 1986, including the Super Bowl XX championship season in 1985.

[2] Fuller was named by Sports Illustrated as one of the top fifteen backup quarterbacks of all time, based on his 1985 season with the Chicago Bears.

McMahon missed the rest of the 1984 season and Fuller became the Bears starter, all the way to the 1984 NFC Championship game against the eventual Super Bowl champion San Francisco 49ers.