Penn State QB was sidelined against Wisconsin

Nittany Lions quarterback Drew Allar, trailing Wisconsin 10-7 at Camp Randall Stadium, sat on the bench during his team's opening drive of the third quarter.

Here's what you need to know about Allar and why he's not in the game:

Update on Drew Allar's injury

Allar was not on the field for coach James Franklin and No. 3 Penn State at the start of the third quarter, with backup Beau Pribula at center.

Shortly before half-time, Allar appeared to have injured his knee.

Despite his injury and his team's deficit in a game that had been won by a touchdown, Allar was shown visibly frustrated on camera.