He's expected to make a full recovery.
"The injury appeared to occur during the Rice game," Texas Head Athletic Trainer for Football Kenny Boyd said. "He had symptoms, but was not affected in practice leading up to BYU. After that, it got progressively worse. We did an MRI on the shoulder last week, and after our medical staff looked at the results, we recommended that he have surgery. He spent some time talking with his family and they agreed that was the route they wanted to go."
"My shoulder was getting progressively worse and when the doctors did an MRI last week, their recommendation was for me to get it fixed," Gilbert said. "That's why I decided to have the surgery now, so I can get it taken care of, start my rehab and be healthy and ready to go for next year. I'm disappointed that I won't be able to play the rest of this year, but I'll be out there helping (Co-Offensive Coordinator and Quarterbacks) Coach (Bryan) Harsin and the quarterbacks as much as I can."
Even more, it would seem to open up an opportunity to transfer, should Gilbert choose to do so after losing his job to the duo. The medical redshirt would allow Gilbert to take a mulligan this year and move down a division without losing any eligibility. He would then start next season as a redshirt junior.
A second-team Academic All-Big 12 selection in 2010, Gilbert has played in 24 career games, including 14 starts. He has completed 305-of-538 passes for 3,301 yards (No. 9 on UT's career list), including 11 200-yard passing games. He also has rushed 118 times for 400 yards and six TDs to record 3,701 career yards of total offense. He started all 12 games in 2010, throwing for 2,744 yards (No. 7 on the UT single-season list) and registering 3,124 yards (No. 6 on the UT single-season list) of total offense.
"We're disappointed for Garrett that he won't be able to help us on the field the rest of this season," Mack Brown said. "He's a tough kid that fought through some pain to continue to play, but when doctors told him the injury was something that needed to be taken care of, we fully supported him in doing that. We also know that Garrett is a very smart kid with a great understanding of our offense, so we're excited that he'll still be around to help Coach Harsin and our young quarterbacks. He will continue to be a great leader for us helping those guys throughout the season. With his work ethic and determination, we know he'll get his shoulder back to full strength as soon as possible."