Devon attended the University of Notre Dame where he was part of the 1988 national championship team. As a senior in 1992, he was selected as Team Captain and was recognized as an Honorable Mention All-American. He was drafted in the 4th round by the Indianapolis Colts in 1993 and played both Outside Linebacker and on Special Teams during his 3 seasons with the Colts. Colts fans voted Devon "Unsung Hero of the Year" in 1993 and was named the Colts Special Team Player of the Year in 1994.
Devon went to play for the Arizona Cardinals from 1995-96. He went back into professional football after a short hiatus, playing with the Tampa Bay Storm of the Arena League for two seasons.