8:00 am UPDATE - WASHINGTON (AP) - A person familiar with the situation says the surgery on Robert Griffin III's knee revealed damage to the ACL.
The Washington Redskins quarterback had surgery Wednesday morning to repair a torn lateral collateral ligament in his right knee.
The procedure also examined Griffin's ACL, which he tore while playing for Baylor in 2009. Another torn ACL would complicate Griffin's chances of returning by the start of next season.
The person spoke on condition of anonymity because the Redskins had not made an announcement about the latest details surrounding the rookie quarterback's injury.
Griffin sprained the LCL last month and reinjured the knee in Sunday's playoff loss to the Seattle Seahawks.
WASHINGTON (AP) - Robert Griffin III is having surgery on a torn ligament and to determine whether there's any other damage in his ailing right knee.
A person familiar with the situation told The Associated Press that the procedure was expected to last about two hours Wednesday morning. The person said orthopedist James Andrews planned to repair a torn lateral collateral ligament and examine the state of Griffin's ACL.
The person spoke on condition of anonymity because the Redskins have not made an announcement about the latest details surrounding the rookie quarterback's injury.
Early Wednesday morning, Griffin tweeted: "Thank you for your prayers and support. I love God, my family, my team, the fans, & I love this game. See you guys next season."