Monroe ranks as the No. 2 safety in the country and is another Top 100 player added to LSU's secondary. Monroe has been a massive LSU target for the better part of a year, and has made several visits to Baton Rouge.
He was last on campus earlier this month for LSU's first camp of the summer, when he went through workouts all three days.
LSU and Texas A&M were long considered the two favorites, but most gave the Tigers a significant edge. That came true as Monroe finally put an end to his recruitment and committed.
LSU already has a commitment from two of the top corners in the country in five-star Saivion Smith and Andraez Williams. The Tigers also have a commitment from four-star safety Cameron Lewis.
Monroe joined fellow Texan Rahssan Thornton in committing to LSU on Wednesday. He's the eighth in less than three weeks, following Williams, Glen Logan, Caleb Roddy, Jakori Savage, Andre Anthony, Erick Fowler and Thornton.
LSU expands its lead as the No. 1 overall recruiting class in the country.