Ibi Watson had 16 points for Dayton (5-2, 1-1 Atlantic 10 Conference). Freshman Mustapha Amzil added 15 points as the Flyers rebounded three days after falling to La Salle in their A-10 opener and losing a 20-game conference win streak.
Tyler Kolek had 16 points for the Patriots (5-3, 1-1). Jordan Miller added 15 points. Javon Greene had 13 points and six rebounds.
George Mason opened the second half on a 13-0 run to grab a 42-41 lead to turn what had been a laugher into a battle with six ties and eight lead changes.
Dayton took the lead for good on a Watson drive that gave the Flyers a 65-63 lead. George Mason missed two 3-pointers, lost the ball to an Amzil steal and were charged with a technical foul in the last 33 seconds.
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