Purdue coach Jeff Brohm might need to use his backup plan Saturday against TCU.

Brohm said starting quarterback Elijah Sindelar has been diagnosed with a concussion. Sindelar went to the team’s medical tent Saturday after the Boilermakers’ final offensive play, his 7-yard run on third-and-14 during a 42-24 victory over Vanderbilt.

“I think it was a concussion, a slight concussion that we’ll monitor and see how he passes all the tests and go through the proper protocol,” Brohm said Monday. “Hopefully, we’ll get him back if he’s ready to go.”

Sindelar has played through pain. He tore the anterior cruciate ligament in his left knee during the first half of a 2017 game against Northwestern. Sindelar finished the game, led the Boilermakers to wins each of the next two weeks to become bowl-eligible and then was selected the Foster Farms Bowl offensive MVP in a victory over Arizona.

After having offseason surgery, Sindelar beat out David Blough for the starting job last year but made only one start and appeared in only two games because of lingering soreness in the knee.

Sindelar must go through the concussion protocol before team doctors allow him back on the field. Through two games, Sindelar has completed 68 of 104 passes with nine touchdowns and three interceptions. He leads the nation with 932 yards passing and has 11 carries for 36 yards.

On Monday, the Big Ten named Sindelar its offensive player of the week after he was 34 of 52 with a career high 509 yards, a career best five touchdown passes and one rushing touchdown.

If he can’t play against TCU, redshirt freshman Jack Plummer would start.

“We’re very confident in Jack,” Brohm said. “He’s had good weeks of practice. He’s improved. He’s got some moxie to him, some athleticism. I think he’s gaining confidence because he’s practiced well, and he has to always be ready to go. We tell him that all the time.”

Plummer (no relation to former NFL quarterback Jake Plummer) came to Purdue as a highly-touted recruited from Arizona but has not yet thrown a college pass.

Sophomores Nick Sipe and Aidan O’Connell would be next on the depth chart. Sipe, the nephew of former Cleveland Browns quarterback Brian Sipe. has been slowed by a back injury since spring practice. O’Connell joined the team as a walk-on in 2017.

Extra point

Former coach Bobby Petrino is apologizing to fans and players in Arkansas seven years after he was fired for misleading officials about his extramarital affair with an athletic department employee that was exposed after the two were involved in a motorcycle crash.

Petrino returned to Arkansas on Monday for the first time since 2012, addressing a packed room for a Little Rock Touchdown Club luncheon. Petrino told the audience he was nervous about the speaking engagement, comparing it to game day.

Then-athletic director Jeff Long fired Petrino in 2012 after the accident during which it was later discovered Petrino was riding with his mistress. That led to revelations that Petrino had hired the woman to a position in the athletic department, and that he had given her $20,000 to buy a new car.

This week’s top games


Ohio State at Indiana, noon (Fox)

Eastern Michigan at Illinois, noon (BTN)

New Mexico at Notre Dame, 2:30 (NBC)

Alabama at South Carolina, 3:30 (CBS)

Stanford at UCF, 3:30 (ESPN)

USC at BYU, 3:30 (ABC)

Arizona State at Michigan State, 4 (Fox)

Iowa at Iowa State, 4 (FS1)

Florida at Kentucky, 7 (ESPN)

Clemson at Syracuse, 7:30 (ABC)

TCU at Purdue, 7:30 (BTN)

Oklahoma at UCLA, 8 (Fox)