Star Alabama Crimson Tide WR Jameson Williams has torn ACL

Play.

The big catch by Jameson Williams shook him up.

Jameson Williams is helped off the field after he made a great catch on a ball thrown by Bryce Young. (0:35)

Sources told Adam that Alabama wide receiver Jameson Williams tore the anterior cruciateeum in his left knee in Monday night's College Football Playoff National Championship presented by AT&T.

Williams will retain his sub 4.3 speed after surgery, and they expect a full recovery, according to sources.

Williams was hurt on a pass from Young in Alabama's loss to Georgia. Williams clutched his left leg before he was hit by a teammate. Williams had four catches.

Williams was ruled out of the second half by Alabama. Williams returned to the sideline with 11 seconds left in the third. He was wearing a game jersey and sweatpants.

He had 75 catches for 1,507 yards and 15 touchdown and averaged 20.1 yards per reception. He is the top wide receiver and the sixth best prospect in the draft.

Williams hasn't said if he will enter the draft or return to Alabama for his senior season.

Mark Schlabach was a contributor to this report.