John Jason Thornton (born October 2, 1976 in Philadelphia, Pennsylvania) is a former American football defensive tackle of the National Football League. He was drafted by the Tennessee Titans in the second round of the 1999 NFL Draft. He played college football at West Virginia.
In addition to four years in Tennsseee, Thornton also played six seasons with the Cincinnati Bengals. He retired following the 2008 season.
Thornton attended Scotland School for Veterans' Children, a residential school for relatives of veterans.