Thomas suffered the tear against New Mexico State on Sept. 27 and is not expected to return to the field this season. LSU never confirmed the extent of Thomas' injury, but reports at the time indicated it was a torn ACL in his right knee.
He Tweeted on Friday that the operation was a success.
Thank you GOD for letting my Surgery go great yesterday Getting better today Day 1 #Rehab— Dwayne??Thomas13 (@Dwaynethomas10) October 17, 2014
Thomas will undergo rehab to get back to playing shape. He's expected to make a full recovery and return to the field next season.
At the time of his injury, Thomas ranked fifth on the team with 24 tackles, including 2.5 for loss. He also had an interception, two quarterback hurries and a fumble recovery, primarily serving as the Tigers' nickelback.
Jamal Adams and Rickey Jefferson, who had the big interception last week against Florida, have seen an increase in playing time since Thomas went down.