Charles Glover scored seven points during a 9-2 spurt to give Mount St. Mary's a 73-68 lead with 3:22 to play. John Ross Glover made a 3-pointer, and Price added another 3 from the top of the arc and Lehigh led 74-73 with 47 seconds left.
Will Miller tried to draw a foul and attempted an awkward 3-pointer that went under the basket and out of bounds to end it.
Kahron Ross added 12 points with nine assists for Lehigh (2-8).
Charles Glover scored 22 points to lead Mount St. Mary's (3-8).