CORVALLIS — When in crunch time, Oregon State wants Roberto Nelson to have the ball.

CORVALLIS — When in crunch time, Oregon State wants Roberto Nelson to have the ball.

Nelson scored six of his 15 points in overtime, including the go-ahead free throw with 2:50 remaining, to pace Oregon State to a 78-76 victory over Arizona State Saturday.

Jermaine Marshall's 3-pointer with 19.5 seconds to play in regulation time capped Arizona State's comeback from a 14-point deficit in the second half and forced overtime with the score tied at 67.

The Beavers (16-14, 8-10 Pac-12) earned a split of the two-game season series with ASU and snapped a four-game losing streak against the Sun Devils (21-10, 10-8) that had stretched over four seasons.

Eric Moreland added 16 points and a career-high 19 rebounds for Oregon State. Devon Collier had 12 points starting in place of sophomore guard Langston Morris-Walker, who Beavers coach Craig Robinson said was suspended by the university Thursday evening for an unspecified rules violation.

Robinson said it was unclear if Morris-Walker would be reinstated before Wednesday's Pac-12 Tournament opener against No. 7 seed Oregon at 6 p.m. in Las Vegas.

Jahii Carson led ASU with 24 points and Jonathan Gilling added 20 for the Sun Devils, who shot 41 percent (25 of 61) to Oregon State's 47.5 percent (28 of 59).

Despite the loss, the Sun Devils held onto the No. 3 seed and earned an automatic berth into Thursday's conference tournament quarterfinals.

Nelson, who came into the game averaging 20.8 points a game, made 6 of 16 shots from the field and all but locked up the Pac-12 scoring title, making him the fifth Oregon State player to lead the conference in scoring and the first since Gary Payton in 1990.

Nelson owned the overtime period, scoring a basket off his own miss to tie the score at 71, making 1 of 2 free throws the made it 72-71, and then knocking down a 3-pointer with 21.6 seconds left that extended the lead to 76-72.

Washington 82, Southern Cal 75

At Seattle, C.J. Wilcox scored 24 points in his final regular-season game and Andrew Andrews added 19 as Washington held off a late charge from Southern California.

California 66, Colorado 65, OT

At Berkeley, Calif., Justin Cobbs made a pair of free throws with 20.8 seconds left in overtime, and California kept alive its slim NCAA tournament hopes with a win over Colorado.

The Golden Bears (19-12, 10-8 Pac-12) scored seven points in overtime, all on free throws. Cobbs made four of them to overcome a cold night from the floor and finished with 21 points and four assists.

Stanford 61, Utah 60

At Stanford, Calif., Dwight Powell made a go-ahead free throw with 36.1 seconds remaining after Stanford missed seven consecutive from the line late, and the Cardinal held on to beat Utah in the Pac-12 regular-season finale for both schools.

Chasson Randle delivered down the stretch on the way to 22 points and forced a turnover with 1.8 seconds left as Utah couldn't get a shot off in the waning seconds with a chance to win.

Washington State 73, UCLA 55

At Pullman, Wash., Que Johnson scored 14 points and hit four 3-pointers to help Washington State rout UCLA and secure an 11th-place Pac-12 Conference finish.

After falling to Southern California Thursday, the Cougars fell into the conference cellar, but the Trojans fell to Washington Saturday, allowing WSU (10-20, 3-15 Pac-12) to climb one notch.