Lacy set up Alabama's second touchdown with another 20-yard run, this time to the Irish 2. Instead of running into a Notre Dame goal-line defense that has become known for goal-line stands, AJ McCarron faked a handoff and found tight end Michael Williams all alone for the score and a 14-0 lead.
Alabama made it 3 for 3 on the next drive when Yeldon scored from a yard out on the first play of the second quarter.
The Alabama fans seemed outnumbered at Sun Life Stadium by Fighting Irish followers, pumped to see their team try to win its first national title in 24 years. But the folks in Crimson and houndstooth were making all the noise as the Tide rolled.
Lacy landed one more blow with 31 seconds left in the half. McCarron dumped off to Lacy, who spun off two tacklers, and went 11 yards to make it 28-0.
The Southeastern Conference, winners of the last six BCS championships, was storming toward seven in a row. Those familiar "S-E-C!" chants started early in this one.
The Fighting Irish started the third quarter with a promising drive that ended with another Alabama highlight.
HaHa Clinton-Dix made a sensational diving interception, grabbing a tipped pass and tapping his toe inches from the sideline. Alabama turned the game's first turnover into another long scoring drive. McCarron capped this one with a 34-yard TD pass to freshman Amari Cooper, the longest TD pass the Irish have given up this season.
With the score 35-0 and some Fighting Irish fans in the stadium record crowd of 80,120, Notre Dame finally got on the board with 4:08 left in the third.
Everett Golson took an option keeper 2 yards for a touchdown to break a streak of 108 minutes, 7 seconds in which Alabama had not allowed a point in a BCS championship game, dating back to the last 6 minutes of the fourth quarter of the 2009 title game against Texas at the Rose Bowl. Alabama had scored 69 straight points in that span.