McGruder was regarded as one of the nation's top defensive linemen during his time at Cheyenne High School.
McGruder was listed in SuperPrep's top 25 defensive line prospects and named Gatorade Nevada Player of the Year as a senior.
In 2002, McGruder appeared in 10 games behind All-American Tommie Harris for the Sooners, collecting 20 tackles (13 solo) with a sack, four stops for losses and four pressures.
For his collegiate career, he appeared in 46 contests, making 75 tackles (38 solo), five sacks, 15 stops behind the line of scrimmage and 12 pressures.
McGruder helped save a family of five when he pulled four of the victims through a door, then doused the fire with an extinguisher.