Alabama wins BCS championship 21-0

Jeremy Shelley kicked five field goals and Trent Richardson broke a 34-yard touchdown run late in the fourth quarter as the No. 2 Crimson Tide beat No. 1 LSU for its second national championship in three years.

Allstate BCS National Championship Game - LSU v Alabama

NEW ORLEANS, LA - JANUARY 09: Trent Richardson #3 of the Alabama Crimson Tide runs for a 34 yard touchdown in the fourth quarter against Morris Claiborne #17 of the Louisiana State University Tigers during the 2012 Allstate BCS National Championship Game at Mercedes-Benz Superdome on January 9, 2012 in New Orleans, Louisiana. (Photo by Ronald Martinez/Getty Images)

Allstate BCS National Championship Game - LSU v Alabama

NEW ORLEANS, LA - JANUARY 09: Head coach Nick Saban of the Alabama Crimson Tide is doused with Gatorade after defeating the Louisiana State University Tigers in the 2012 Allstate BCS National Championship Game at Mercedes-Benz Superdome on January 9, 2012 in New Orleans, Louisiana. Alabama won the game by a score of 22-0. (Photo by Kevin C. Cox/Getty Images)

Allstate BCS National Championship Game - LSU v Alabama

NEW ORLEANS, LA - JANUARY 09: Marquis Maze #4 of the Alabama Crimson Tide after defeating Louisiana State University Tigers in the 2012 Allstate BCS National Championship Game at Mercedes-Benz Superdome on January 9, 2012 in New Orleans, Louisiana. Alabama won the game by a score of 22-0. (Photo by Ronald Martinez/Getty Images)

Allstate BCS National Championship Game - LSU v Alabama

NEW ORLEANS, LA - JANUARY 09: Trent Richardson #3 of the Alabama Crimson Tide celebrates with Alfred McCullough #52 after scoring a touchdown in the fourth quarter against the Louisiana State University Tigers during the 2012 Allstate BCS National Championship Game at Mercedes-Benz Superdome on January 9, 2012 in New Orleans, Louisiana. (Photo by Ronald Martinez/Getty Images)

Allstate BCS National Championship Game - LSU v Alabama

NEW ORLEANS, LA - JANUARY 09: Ryan Baker #22 of the Louisiana State University Tigers breaks up a pass intended for Darius Hanks #15 of the Alabama Crimson Tide during the 2012 Allstate BCS National Championship Game at Mercedes-Benz Superdome on January 9, 2012 in New Orleans, Louisiana. (Photo by Chris Graythen/Getty Images)

Allstate BCS National Championship Game - LSU v Alabama

NEW ORLEANS, LA - JANUARY 09: Jeremy Shelley #90 of the Alabama Crimson Tide celebrates with his team after kicking a field goal in the second quarter against the Louisiana State University Tigers during the 2012 Allstate BCS National Championship Game at Mercedes-Benz Superdome on January 9, 2012 in New Orleans, Louisiana. (Photo by Ronald Martinez/Getty Images)