The No. 13 LSU Tigers defeated BYU 27-0 at the Mercedes-Benz Superdome in New Orleans on Saturday.
It was the first time since a 2015 game at Michigan that BYU was shut out and only the third time in 528 games since 1975 that BYU did not score a single point.
Both teams finished the first quarter with zeros on the scoreboard, but it was all LSU after that.
Derrius Guice led all players with 120 rushing yards and two touchdowns for the Tigers.
BYU finished the night with -5 rushing yards; it was the first time since a 2003 loss to Stanford that the Cougars had a negative rushing total.
Guice's first touchdown came less than a minute into the second quarter and his second came before halftime. BYU trailed 14-0 at the half after LSU missed a 34-yard field goal.
The Tigers added two field goals in the third quarter to make it 20-0.
BYU's defense held LSU on a fourth-and-goal to keep it at a three possession game, but the offense couldn't get anything going and turned the ball over on a failed fake punt attempt.
LSU converted on a short field and Darrell Williams scored on a 1-yard touchdown run.
BYU quarterback Tanner Mangum went 12-for-24 on the night, throwing for 102 yards and one interception.
The Cougars will look to rebound with a home game against rival Utah on Saturday. Kickoff is scheduled for 8:15 p.m. and the game will be broadcast on ESPN2.