Rivals250 wide receiver Brian Thomas is expected to sign his national letter of intent on Tuesday, a source told Rivals on Monday evening.

Thomas, the nation's top uncommitted wide receiver, is choosing from LSU, Texas A&M or Alabama. The announcement is expected around 1 p.m. CT at Walker (La.) High School.

Thomas is the nation's No. 140 overall player and the No. 5-ranked prospect in Louisiana for 2021. He's a dual-sport athlete that also holds Division I scholarship offers on the basketball side of things.

The Rivals FutureCast favors the in-state Tigers, but Texas A&M and Alabama each hold 15-percent of predictions.