PULLMAN, Wash. (AP) — Charles Callison scored a career-high 30 points and had five steals, pacing Washington State past Colorado 91-89 in overtime on Saturday, as the Cougars put a four-game losing streak to rest and kept the Buffaloes winless in conference play.

Ike Iroegbu hit a contested layup to give Washington State a two-point lead with 10.5 seconds left in overtime after Derrick White's jumper put Colorado up two with 1:52 left.

Josh Hawkinson finished a hook-shot to put the Cougars up four with 35 seconds to go in regulation. Xavier Johnson tipped in a George King miss, then White hit two free throws to tie the game at 83 with 7.2 seconds left. Callison missed a long 3 at the regulation buzzer.

Iroegbu finished with 20 points and eight boards. Hawkinson had 18 and 6.

White paced Colorado with 25 points, six assists and five rebounds. He also supplied the game-tying free throws in regulation and a key bucket in overtime.

WSU led for most of the first half, which opposes its last game, a 41-point home loss to Utah, where the Cougars fell out of contention early.

Callison was active on both ends from the get-go. He started 3 of 4 from the field, which included a progression where he hit long step-back jumper, stole a pass at the other end, then hit a 3-pointer moments later to put the Cougars up 23-20.

Consecutive 3s from Viont'e Daniels and Malachi Flynn gave WSU a seven-point advantage late in the first and entered halftime up four.

The teams traded baskets throughout the second. The Cougars' shooting helped them maintain the lead.

Colorado did not regain the lead until overtime.

BIG PICTURE: The Cougars found their shooting stroke early and often. They shot 53.8 percent from the field, a cut above the season average (44.4 percent). WSU has been down on a winless streak of its own recently, but Saturday's win breathed some life into the Cougars' season.

UP NEXT: The Cougars head down to the desert for key road tests at No. 14 Arizona — which recently lifted the suspension off standout guard Alonzo Trier — on Thursday and Arizona State on Jan. 28.

NEXT FIVE GAMES:

Jan. 26 at Arizona, 6:30 p.m. (Pac-12 Network)

Jan. 29 at Arizona State, 11 a.m. (Pac-12 Network)

Feb. 1 UCLA, 6 p.m. (Pac-12 Network)

Feb. 4 USC, 5 p.m. (Pac-12 Network)

Feb. 9 at Utah, 6 p.m. (Pac-12 Network)

(All Times Pacific)

PAC-12 SCHEDULE (Sat. Jan. 21)

Washington State 91, Colorado 89 (OT)

Arizona 96, UCLA 85

Oregon 69, Stanford 52

Utah 94, Washington 72

California at Oregon State, 7:30 p.m. (Pac-12 Network)

(All Times Pacific)

WOMEN’S BASKETBALL - INJURY RAVAGED WSU HOSTS WASHINGTON: Without three players expected to have significant roles this season, Washington State (8-10, 3-4) hosts Apple Cup rival Washington, the top team in the Pac-12 so far this season, Sunday afternoon at Beasley Coliseum (1 p.m., Pac-12 network).

Borislava Hristova (broken foot), Louise Brown (broken foot) and promising freshman Chanelle Molina (torn ACL) are all feared out for the rest of the season with major injuries. In addition, freshman reserve Cameron Fernandez suffered a severe concussion on the last road trip and is listed as day-to-day. Junior guard Pinelope Pavlopoulou made her first career start for the Cougars at Arizona last Sunday.

“I’ve never seen anything like this, losing three starters in one season,” Daugherty said. “It’s been an adjustment for the (injured players). But I really love how well our team is playing and continuing to compete. In the long run, our young players will benefit from being forced to play the amount of minutes they’re playing right now. It shows how well we have recruited to this program. Our young players are very talented. They all have great futures.”

Washington (18-2 overall, 6-1 Pac-12) enters Sunday's matchup as the Pac-12's highest ranked team coming in at No. 8 in the AP Top-25 and No. 7 in the Coaches Poll. The Huskies, eying their second straight trip to the Final Four, also possess the Pac-12's best NCAA RPI at No. 7.

Kelsey Plum, the nation's leading scorer, became just the 12th player in NCAA history and first in Pac-12 history to reach 3,000 career points two weeks ago and she is approaching the NCAA's all-time scoring record.

NEXT FIVE GAMES:

Jan. 22 WASHINGTON, 1 p.m. (Pac-12 Network)

Jan. 27 STANFORD, 8 p.m. (Pac-12 Network)

Jan. 29 CALIFORNIA, Noon (Pac-12 Stream)

Feb. 3 at Colorado, 5 p.m. (Pac-12 Network)

Feb. 5 at Utah, 1 p.m. (Pac-12 Stream)