Jesse Reed scored 27 points, 16 in the first half, to lead the Eagles (10-7, 3-2 Patriot), with Charlie Jones adding another 11 points. Gardner finished with eight points by hitting 2 of 4 from behind the arc.
Kempton, the reigning Patriot League Rookie of the Year, finished with 24 points and 13 rebounds to lead Lehigh (7-9, 1-4). Price added another 13 points.
On Saturday, Gardner scored five points in the final 13 seconds of regulation to force overtime in the Eagles' 71-69 double overtime win over Colgate.