CORVALLIS, OR (AP) - Deandre Ayton had 19 points, 12 rebounds and three blocks, and No. 14 Arizona, minus one of its star players, beat Oregon State 75-65 in overtime on Thursday night.
Rawle Alkins added clutch scoring with 16 points and eight rebounds, and Dusan Ristic had 14 points for the Wildcats (22-6, 12-3 Pac-12), who were without guard Allonzo Trier.
The junior was declared ineligible by the NCAA after a trace amount of a banned substance was found during a late January drug screening, according to a university statement released Thursday.
Alkins made two free throws with 14 seconds left to send the game into overtime, and then made two 3-pointers as part of a 10-0 surge that put the Wildcats up 73-64 with 1:11 left in the extra period.
Ethan Thompson had 20 points and eight rebounds for the Beavers (13-14, 5-10). Tres Tinkle added 14 points, six rebounds and six assists.
Oregon State didn't attempt a free throw in the first half, but shot 14 for 17 from the line for the rest of the game.
Arizona went on an 11-0 run, fueled by six points from Ristic, to go ahead 27-15 with 7:15 left in the first half. Oregon State went more than six minutes without scoring.
The Wildcats went to the break up 37-29.
The Beavers responded after halftime and Gligorije Rakocevic's jump hook tied the game at 50-all with 9:51 remaining.
There were several lead changes from there before Stephen Thompson Jr. missed a jumper before the regulation buzzer for Oregon State.
Arizona is appealing the suspension for Trier, who was averaging 19.6 points, 3.2 rebounds and 3.2 assists.