Michigan star running back Blake Corum is expected to have surgery on his injured left knee that would cause him to miss the postseason, a person with knowledge of the situation told The Associated Press on Thursday night.

The person spoke on condition of anonymity because Michigan was not publicly disclosing Corum's condition.

No. 2 Michigan (12-0) plays Purdue in the Big Ten championship game Saturday night in Indianapolis and is likely heading toward its second straight College Football Playoff appearance.

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Over the past 25 years, college football's postseason format for crowning a national champion has grown from two teams to four and now, starting in 2024, to 12.

For a sport that started in 1869 and spent most of the 20th century using bowls and polls to determine who was No. 1, evolution has hit warp speed, racing from Bowl Championship Series to College Football Playoff 2.0.

IOWA CITY, Iowa (AP) Cade McNamara, the backup quarterback at Michigan this season, has announced he'll transfer to Iowa.

McNamara tweeted "New Beginning" with a picture of him in an Iowa uniform Thursday night. He presumably will go into next season as the front-runner for the starting job and have two seasons of eligibility.

TUCSON, Ariz. (AP) Arizona has agreed to a contract extension with football coach Jedd Fisch through the 2027 season.

The deal announced Thursday is pending approval from the Arizona Board of Regents.

DETROIT (AP) Michigan standout defensive lineman Mazi Smith will play for the Wolverines in the Big Ten championship game this weekend against Purdue while facing a felony charge of carrying a concealed gun.

The charge was filed in an Ann Arbor court, nearly two months after the handgun turned up during a traffic stop. Smith, a 21-year-old senior and team co-captain from Grand Rapids, Michigan, had four tackles and one assist against Indiana on Oct. 8, the day after the incident.

LINCOLN, Neb. (AP) Mickey Joseph, Nebraska's interim football coach for nine games this season, is accused of putting his hands around a woman's throat, pulling her hair and punching her before being taken into custody, according to a police affidavit filed Thursday.

Joseph, 54, was arrested Wednesday on suspicion of strangulation and third-degree domestic assault. Joseph denied to police that he assaulted the woman. Nebraska placed Joseph on administrative leave.

LINCOLN, Neb. (AP) Marcus Satterfield will join new Nebraska coach Matt Rhule's staff as offensive coordinator after serving in the same role at South Carolina for two seasons.

Rhule announced the hirings of five on-field assistants and a strength coach Thursday. He was introduced as the Cornhuskers' coach on Monday.

LAS VEGAS (AP) The Pac-12 Conference extended its agreement to at least 2023 to play its championship game at Allegiant Stadium in Las Vegas.

The game Friday between No. 4 Southern California and No. 12 Utah will be the second in Las Vegas. Commissioner George Kliavkoff said Thursday the game has sold out.

GAINESVILLE, Fla. (AP) Florida backup quarterback Jalen Kitna was released from jail on $80,000 bond on Thursday, a day after he was arrested on five child pornography charges that police said included images of a man having sex with a young girl.

Judge Meshon Rawls set the bond and as conditions for Kitna's release ordered him not to have any unsupervised contact with minors and not to have any internet access.

The Trojans were 1-2 and reeling from a demoralizing loss on a Hail Mary by Appalachian State.

"I think it's really, really hard to get people to get up off the mat after a gut-wrenching defeat like that and lay it all on the line again," Sumrall said.