Shortly after a high school coaching career around the Tampa area, Calvin was a member of the University of South Florida's first coaching staff in 1996 where he remained until 2001 when he joined Rich Rodriguez's staff at West Virginia University. Magee followed Rodriguez to the University of Michigan in 2008, where he served as offensive coordinator until Rodriguez and his staff were fired after the 2010 season. On December 5, 2011, Rich Rodriguez announced that Magee would join his staff at the University of Arizona as offensive coordinator. He is also the running backs coach.