The Mountaineers (1-2) jumped out to an early 10-2 lead, and led for the majority of the first half behind 17 of Jeremy Goode's team-high 22 points. But the Patriots (4-1) countered with a 17-5 run to open the second half. The win was the seventh straight in a non-conference home game for the Patriots.
Mount St. Mary's, which drew to within 63-60 with 2:59 remaining before George Mason responded with a 9-0 run to end the game, shot just 6 of 17 from the free-throw line.
Ryan Pearson scored 14 points while Darryl Monroe and Louis Birdsong had 10 each for the Patriots.