RICHMOND, Va. (Interstat) — Richmond built a commanding 20-point halftime lead and withstood a second-half push to upset George Mason 82-70 in Atlantic 10 men’s basketball Tuesday night at Robins Center.

The Spiders (14-11) shot 12 for 31 from 3-point range in the first half, racing to a 49-29 advantage. Mikkel Tyne scored 16 points, all before halftime, to lead the charge. The Patriots (21-4), who entered as heavy favorites, mounted a rally after the break but never closed the gap to single digits. Fatt Hill scored 23 points for George Mason, while Riley Allenspach added 16.

Richmond’s efficient offense, which scored 117.1 points per 100 possessions, proved decisive. The Spiders also converted 14 points off 15 George Mason turnovers. Attendance was 4,282.