Dominant defense: How the Irish emerged as 1 of the nation's best

Ever since most of us were children, we've heard the phrase, "Defense wins championships".

We don't know if that's true yet for the 2018 Notre Dame football team, but it certainly is what got them in championship contention this year.

Chuck Freeby looks at the Irish defensive unit and why it has played with a proverbial chip on its shoulder this whole season.

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