The Bears (10-17, 4-6 Ivy League) led 55-51 with just less than 20 seconds left, but Patrick Saunders dropped in a layup and Marcus Schroeder sank a free throw to pull the Tigers within one point. Gruber connected on 2 of 2 free throws, though, and Douglas Davis missed a late jumper for the Tigers to seal Brown's win.
Peter Sullivan added 13 points and Tucker Halpern had 12 for the Bears, who finished with a 94.7 percent mark from the foul line (18-for-19). The Tigers shot just 57.1 percent from the stripe (4-for-7).
Muller was 7-for-7 from the foul line -- one of four Bears to finish perfect at the stripe.
Schroeder scored 17 points for the Tigers (16-7, 7-2), who dropped out of first place in the conference.