The College Football Playoff features four of the bluest of blue bloods. No. 1 Alabama takes on No. 4 Notre Dame and No. 2 Clemson faces No. 3 Ohio State. Cole Cubelic of the SEC Network and ESPN joins AP’s Ralph Russo to breakdown each matchup. For Notre Dame to stay within striking distance of the might Crimson Tide, the Irish need to play perfectly complementary football. Meanwhile, the other semifinal could come down to which is more efficient: Trevor Lawrence and Clemson’s passing game or Ohio State’s powerful running game.Also, what to make of Auburn’s hiring of Boise State’s Bryan Harsin as head coach?