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

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

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

Notre Dame heads to halftime down 10-3 against Penn State and perhaps without its starting quarterback for the second half

Notre Dame quarterback Riley Leonard left the College Football Playoff semifinal at the Orange Bowl late in the first half and was being evaluated by the Fighting Irish’s medical staff