Ohio State heads into the national title game as a projected 5.9-point favorite over Notre Dame, per the updated SP+ ratings. That's a pretty solid disagreement with the current ESPN BET line of Ohio State -9.5, though it doesn't take into account Notre Dame's increasing injury issues. (SP+ isn't designed to react to injuries.)
The Fighting Irish have overcome injuries with relative ease all season, but the sportsbooks seem to be reacting to a pair of new offensive line injuries:
ESPN Bet projection: Ohio State 27.5, Notre Dame 18.0 (OSU -9.