Ryan Diem (born July 1, 1979) is a former American football offensive lineman in the National Football League. He was drafted by the Indianapolis Colts in the fourth round of the 2001 NFL Draft and played his entire 11-year career for them. He played college football at Northern Illinois.
Diem was drafted by the Indianapolis Colts in the fourth round of the 2001 NFL Draft. Diem attended Glenbard North High School and then went on to Northern Illinois University (1997-2000) before getting drafted by the Colts He played his entire career for them, starting 150 of 158 games at offensive tackle and guard from 2001 to 2011. He was a member of the Colts Super Bowl XLI victory over the Chicago Bears. He retired on March 23, 2012.