McMahon, who recently completed courses leading to his degree from BYU, also was inducted into the school's Hall of Fame.
As a quarterback for the Cougars between the years 1977 and 1981, McMahon passed for 9,536 yards and 84 touchdowns. His most prolific single season was in 1980 when he threw for 4,571 yards and a whopping 47 touchdowns. Some of McMahon's collegiate football accomplishments inlcude:
- 3-time Western Athletic Conference Offensive Player of the Year (1978, 1980 and 1981)
- NCAA leader in Pass Completions for 1980 and 1981
- NCAA leader in Passing Yards for 1980
- NCAA leader in Total Touchdowns for 1980 (53)
McMahon was drafted fifth overall in the 1982 NFL entry draft by the Chicago Bears, for whom he would also wear the number nine.