The No. 3 team in the nation will be without its starting quarterback this weekend as Notre Dame’s Ian Book will reportedly miss the team’s upcoming home game against Florida State due to an undisclosed injury.

This news was first reported by Irish Sports Daily and has since been confirmed by ESPN. Book is expected to potentially return to the lineup next weekend for the game against Illinois.

The junior signal caller has been somewhat of a revelation for the Fighting Irish this season after coming off the bench and replacing Brandon Wimbush in the starting lineup at midseason. Book replaced Wimbush for the Sept. 22 Wake Forest game and has since thrown for 1,824 yards, 15 touchdowns to only four interceptions while completing over 74 percent of his passes. He has also added another 218 rushing yards and four scores on the ground.

If Notre Dame somehow manages to lose to FSU without Book in the lineup, it will be fascinating to see how the College Football Playoff committee factors the loss moving forward. Will it be seen as a mulligan of sorts? If Michigan continues to win, would the Wolverines jump Notre Dame despite losing to the Irish?

Notre Dame is undefeated this season with a 9-0 record and looks to continue that streak against a 4-5 Florida State team eager to land Willie Taggart the first big win of his Seminole career.