Way back on November 17, Buffalo Bills center Eric Wood had surgery to repair a torn ACL suffered in an emphatic road loss to the Dallas Cowboys. Today, 110 days since undergoing that procedure, Wood tweeted a significant milestone in his rehabilitation process.

"Ran at 100% body weight for the first time since surgery and it felt great," Wood wrote Tuesday.

Wood, entering his fourth year out of Louisville (and second as the Bills' starting center), is one of several Bills players that must answer questions about his long-term viability thanks to an unfortunate history of injuries. As you may recall, Wood's rookie season in 2009 ended with a horrific injury to his left leg, and he's now ended two of his first three seasons on Injured Reserve.

Still, the Bills are clearly comfortable with Wood at center, and the fact that Wood is already running unencumbered is a clear indication that, at least to start the 2012 season, last year's injury should no longer be of concern. He may not participate in off-season mini-camps or organized team activities, but training camp seems like a certainty at this point.