Leodis McKelvin had surgery on his shoulder on January 10th. 1/11
Mike Caussin suffered a torn ACL in his right knee in the win over Denver and had surgery. He is currently re-habbing and hopes to be ready for the season. 3/6
Kraig Urbik suffered a torn meniscus and has successful surgery. He is currently rehabbing. He expects a full recovery in time for the offseason program. 3/6
Demetrius Bell suffered a torn meniscus and had surgery. He should be fine as he enters free agency. 3/6
Torell Troup had surgery on his back, he had a small fracture in his spine that was suffered in the final preseason game. That, along with a disk problem he has had for a few years forced him to miss 5 of his first 11 games before being placed on injured reserve. He is walking in a pool and wearing a brace. He is expected take it off and move around in 8 weeks and should begin weight work in 12 weeks. The goal is to have him ready for training camp but he hopes to be able to take part in at least some of the offseaon organized team activities. 1/11
Kyle Williams had successful surgery on bone spurs under his Achilles tendon. If he kept playing on it, his Achilles could have ruptured. Since it didn't the surgery was easier. He already has more range of motion in his ankle than he has had in years. He has the walking boot off and has begun running on dry land after working in the pool initially. He expects to be ready in time for training camp but won't take part in OTAs and mini camps. 3/6
Rian Lindell is fully recovered from a broken bone in his right shoulder that caused him to go on injured reserve. 3/6
Fred Jackson is fully healed from his broken fibula and is now running. 3/6
Shawne Merriman had successful surgery on his Achilles. It had flared up and he decided to have surgery to keep it from rupturing. It was a similar surgery to the one Kyle Williams had. He also had his shoulder cleaned up as well. He is back running and hopes to make a full recovery for next season. 1/11
Marcus Easley has been cleared to return to football in 2012. He missed this season with a heart ailment but it is behind him and has been told it will not come back. 1/11
Lee Smith suffered a left ankle injury against San Diego and was placed on injured reserve. 1/2
Terrence McGee suffered a torn patellar tendon in his left knee and had surgery. He is expected to be fine for offseason workouts. 3/6
Donald Jones went on injured reserve with an ankle injury but should be fine for offseason workouts. 3/6
Eric Wood suffered a torn ACL against Dallas and had successful surgery on the injury. He ran for the first time at 100% body weight on March 6th and he tweeted he felt great. He is still shooting for the start of training camp to return to action. 3/6
Chris White missed about half the season with a torn ACL. He had surgery on it and hopes to be ready sometime during the offseason. 1/2
Roscoe Parrish suffered a severe left ankle injury early in the season. He is now nearly fully healthy and hopes to return to the Bills in 2012. 1/2
Reggie Torbor missed the season with a shoulder injury. No word if it the same injury that ended his season in 2010. He had surgery for a torn labrum. 1/2
Leodis McKelvin had surgery on his shoulder on January 10th. 
1/11