San Francisco built a series of eight-point leads only to see them vanish.
The Matadors (2-7), playing USF for the first time, lost their fifth-straight game. Freshman Tavrion Dawson scored a season-high 19 points with 11 rebounds for his first double-double. Dawson swept in for a layup and was fouled, converting the 3-point play that cut the USF lead to 63-61 with 15 seconds left.
But when the Matadors fouled to get the ball back, Clemons put the game out of reach with two free throws.