Paul Rhoads was one of the most popular coaches at Iowa State. He just didn't win enough to keep his job.

Iowa State said that athletic director Jamie Pollard told Rhoads on Sunday that he's out after seven seasons.

Rhoads went 32-54 with the Cyclones, and he won only eight games in his final three seasons.

Iowa State is 3-8 this season, after blowing a 35-28 lead with 1:31 to go in Saturday's loss at Kansas State.

Iowa State signed Rhoads to a 10-year, $20 million contract before the 2012 season. Rhoads is due a buyout of roughly $4.5 million. He will coach his final game with Iowa State on Saturday at West Virginia.

Rhoads, a defensive coordinator at Pittsburgh (2000-07) and Auburn (2008), was hired to replace Gene Chizik before the 2009 season, and quickly won over a fan base by finishing 7-6 and beating the Gophers in a bowl game.

Sooners QB hurting after hit to the helmet

Oklahoma quarterback Baker Mayfield's status is uncertain for Saturday's showdown with Oklahoma State. Mayfield was shaken up in the second quarter of the Sooners' victory by a helmet-to-helmet hit from TCU linebacker Ty Summers, who was ejected for targeting.

The fifth-ranked Sooners (10-1, 7-1 Big 12) can clinch the conference title with a victory over the ninth-ranked Cowboys (10-1, 7-1).

Mayfield rose on Heisman Trophy watch lists after leading the Sooners to victory at Baylor the previous week. He's completed 69 percent of his passes, with 32 touchdowns and five interceptions. He also 343 yards rushing, with six TDs.

Mayfield played the rest of the first half after the hit from Summers.

"Our trainers and doctors were constantly, with each series, every time Baker was off, checking him, asking him questions, making sure he was OK, and everything was checking out fine," Stoops said. "And then at halftime, they approached him again and Baker admitted to having a headache, and that's when our doctors said we're not going to have him play."

Backup Trevor Knight completed five of 16 passes for 76 yards, with one interception. Knight would start Saturday if Mayfield can't.

Notre Dame tailback has sprained ankle

Notre Dame's leading rusher, C.J. Prosise, has a sprained ankle and is listed as doubtful for Saturday's game, in which the fourth-ranked Fighting Irish play No. 13 Stanford with a college football playoff berth on the line.

Cornerback KeiVarae Russell, the team's second-leading tackler, is out for the game with a broken right leg.

Prosise has a high ankle sprain, suffered when his left foot got caught under Boston College defensive lineman Connor Wujciak as he was being tackled in the second quarter of Saturday's 19-16 win.

Prosise, who has rushed for 1,029 yards, will be replaced by freshman Josh Adams, who has three 100-yard rushing games and has 592 yards rushing, although he was held for 39 yards on 13 carries against the Eagles, including a fumble on the BC 3.

"This is a one game all-in," coach Brian Kelly said. "We'll do whatever is necessary to provide the kind of running game that is necessary. So it's all hands on deck in this situation."

Washington State QB suffers head injury

Washington State starting quarterback Luke Falk was carted off the field with an apparent head injury in the third quarter of Saturday night's 27-3 home victory over Colorado.

Falk was taken off the field on a backboard with 8:16 left in the third quarter after being sacked. Falk, whose head slammed against the turf, appeared to be knocked out and was tended to on the field for seven minutes. Falk gave two thumbs up and waved his hands as he left the field.

Falk's injury came a week after he was checked for a concussion against UCLA and passed protocol.

Late Saturday

No. 15 Stanford 35, California 22: Christian McCaffrey had a 49-yard scoring pas and 98-yard kickoff return for a TD among his school-record 389 all-purpose yards as the host Cardinal (9-2, 8-1) clinched a spot in the Pac-12 Championship Game.