Notre Dame star quarterback Riley Leonard returned in the third quarter of the Orange Bowl on Thursday after entering concussion protocol late the first half following a big hit. Leonard's brief absence injected some uncertainty for the 7-seed Fighting Irish in their College Football Playoff semifinal battle with 6-seed Penn State.

Notre Dame quarterback Riley Leonard was ushered off the field by officials after a possible concussion in the Orange Bowl against Penn State, but returned.

Notre Dame quarterback Riley Leonard briefly went out of the game, then returned to find the end zone in the College Football Playoff semifinal against Penn State on Thursday night at the Orange Bowl.

Notre Dame QB Riley Leonard suffered an injury vs. Penn State in College Football Playoff semifinal at the Orange Bowl.

Notre Dame trails Penn State 10-3 at halftime of the Orange Bowl, with a spot in the National Championship Game against the winner of tomorrow night’s Texas-Ohio State game on the line. But the Fighting Irish might be without starting quarterback Riley Leonard for the rest of the game.

Notre Dame quarterback Riley Leonard exited the second quarter of the College Football Playoff Orange Bowl semifinal game against Penn State with an apparent he

Notre Dame vs. Penn State in CFP Semifinal Orange Bowl at Hard Rock Stadium. Follow along for live scoring updates

Follow the action live as the Fighting Irish and Nittany Lions face off in south Florida with a spot in the College Football Playoff title game on the line.

Notre Dame quarterback Riley Leonard left the game with an injury, while Penn State's run game is dominating.

Both the Notre Dame Fighting Irish and Penn State Nittany Lions entered Thursday’s Orange Bowl matchup with injury questions concerning a key player.