Karl Robert Sweetan (Pronounced: Swee-TAN) (October 2, 1942 – July 2, 2000) was an American professional football quarterback.

Sweetan grew up in Dallas and graduated from South Oak Cliff High School in 1961.

Sweetan played football at Navarro Junior College and Texas A&M before transferring to Wake Forest.

During his first season, in 1966, he replaced an injured Milt Plum in an October 16 game against the Baltimore Colts.

[3] Sweetan gained a different kind of notoriety when it was alleged that he tried to sell an NFL football playbook to another team; however, the charge was not proven.