According to the Associated Press:

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 to The Associated Press 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.

So, what does this mean for the Redskins 2013 season? Things may not be as bad as you might think. It is possible that RGIII could be on the field at the start of the regular season. Peter King of Sports Illustrated sent out this comparison on Tiwtter Wednesday morning:

So, both Welker and Peterson had successful seasons following similar surgery, so all may not be lost for Washington in 2013. Besides, Kirk Cousins showed he was more than capable of leading the Redskins when RGIII was out against Baltimore and Cleveland.

Win McNamee/Getty Images
Al Bello/Getty Images
Al Bello/Getty Images
Al Bello/Getty Images
Al Bello/Getty Images