Johnson accepted an athletic scholarship to attend the University of Florida in Gainesville, where he was a quarterback for coach Steve Spurrier's Gators teams from 1996 to 1999.[3] Memorably, Johnson threw for 460 yards and seven touchdowns against the Central Michigan Chippewas in 1997, setting a Southeastern Conference (SEC) record for most touchdown passes in a game, and an NCAA Division I record for most touchdown passes in a half.[3] In three seasons as the Gators' principal starter, he threw for 7,114 yards, sixty-two touchdowns and thirty-six interceptions, completing 504 of 907 attempts, and was selected as a team captain as a senior.[3]
After graduating from Florida, Johnson was not selected in the 2000 NFL draft, but signed with the Atlanta Falcons as a free agent. As an Atlanta Falcon in 2002, Johnson led the team to a 17–10 victory in a start against the New York Giants. In the game, Johnson completed 19 of 25 passes for 257 yards and one passing and one rushing touchdown. In four seasons with the Falcons, he started eleven games and passed for 2,600 yards.[5] He has since played three additional seasons, mostly as a back-up or practice squad quarterback for three different teams.[5] On September 1, 2007, he was released by the Cincinnati Bengals after playing the preseason as a backup to Carson Palmer.
Johnson was also a second-round draft pick in 1996 for the Tampa Bay Devil Rays, playing as a third baseman in their minor league system in 1996 and 1997 before suffering a rotator cuff injury and leaving to concentrate on football full-time.[6][7]
Football Outsiders uses the term called "the Doug Johnson Effect," referring to "part-time players who had a very good performance the previous season in only one or two games," as a caution against overvaluing NFL players for the next season.[8]
^Chuck O'Donnell, "Franchise snapshot: Atlanta Falcons," Football Digest (November 2004). Retrieved November 13, 2004. He also was the backup quarterback for the Atlanta Falcons in training camp for the 2013 season. Archived at [2] on October 30, 2006.
Carlson, Norm, University of Florida Football Vault: The History of the Florida Gators, Whitman Publishing, LLC, Atlanta, Georgia (2007). ISBN0-7948-2298-3.
Golenbock, Peter, Go Gators! An Oral History of Florida's Pursuit of Gridiron Glory, Legends Publishing, LLC, St. Petersburg, Florida (2002). ISBN0-9650782-1-3.
Hairston, Jack, Tales from the Gator Swamp: A Collection of the Greatest Gator Stories Ever Told, Sports Publishing, LLC, Champaign, Illinois (2002). ISBN1-58261-514-4.