After trailing 54-47 early in the second half, the Mountaineers battled back, finally grabbing the lead with 2:59 remaining on a Kristijan Krajina layup. Bucknell would have a final opportunity to win, but D.J. MacLeay missed a 3-point shot with four seconds left to seal the game for the Mountaineers.
Krajina matched Graves with 16 points for Mount St. Mary's, while Bryan Ashe added 10.
Bucknell was led by Chris Hass, who led all scorers with 17 points. Dom Hoffman added 14 points, and MacLeay finished with 11 and four rebounds.