John Thomas O'Sullivan is an American former professional football quarterback who played nine seasons in the National Football League (NFL), two seasons in NFL Europe and one season in the Canadian Football League (CFL). He played college football for the UC Davis Aggies, starting for three years and throwing for career totals of 10,745 yards and 96 touchdowns. He was named a first-team All-American in 2000 and a second-team All-American in 2001. He was inducted into the Cal Aggie Athletics Hall of Fame in 2008.

The 2007 season was the Minnesota Vikings' 47th in the National Football League (NFL). The Vikings' 8–8 record under second-year head coach Brad Childress was an improvement on their 6–10 record in 2006; nonetheless, for the third straight year, the Vikings failed to make the playoffs.