The toughest game Notre Dame will play this season is obviously going to happen on Jan. 20, the College Football Playoff national championship game in Atlanta against Ohio State. The toughest game the Irish played to date probably was the Orange Bowl against Penn State.

Here's a look at the early betting odds for the College Football Playoff championship between Ohio State and Notre Dame on Jan. 20:

THE NOTRE DAME FIGHTING IRISH It's not the luck of the Irish. It's the skill, the grit, the perseverance, the clutch factor. Notre Dame beat Penn State, 27-24, in the Orange Bowl to advance to the College Football Playoff National Championship.