John Bradley St. Clair (born July 15, 1977) is an American former professional football offensive tackle.
St. Clair was an All-America selection by Super Prep following 1995 senior season at William Fleming High School in Roanoke, Virginia.
St. Clair earned four letters at tight end and defensive tackle and was also named to the All-regional team by Blue Chip Illustrated and was rated as one of the top-25 players in Virginia.
He moved to the offensive line as a sophomore after playing as a reserve tight end during redshirt freshman season.
On March 12, 2004, the Dolphins agreed to a two-year, $2.6 million contract with St. Clair, who was an unrestricted free agent.
After he was released by Miami, St. Clair signed with the Bears and played in the final 13 games of the regular season, including a start at each tackle position.
The next season, Chicago signed St.Clair to a three-year $5 million contract and he played all 16 games for third time in his career, with two starts at left tackle for the Bears.