How Did Logan Mankins Play An Entire Season With A Torn ACL?

Last week, we learned via Adam Schefter that Patriots offensive guard Logan Mankins played the entire 2011 season on a torn ACL. Mankins, who sustained the injury in New England's season opener, finally had surgery to repair the ligament last February. Until then, however, the injury hadn't been diagnosed and, as… » 9/19/12 2:05pm 9/19/12 2:05pm