We know now that Patriots guard Logan Mankins was playing on a torn ACL throughout last year's playoffs.

However, that wasn't revealed until a postseason MRI, and Mankins returned to the football field for the first time since learning of that injury on Sunday, not able to suit up in full pads but participating in drills nonetheless. Bill Belichick gave Mankins some extremely high praise for the normally reserved coach, saying that Mankins has worked "as hard as anyone" in rehabbing the injury.

Watch the video above for Jeff Howe's report on Mankins from Patriots training camp, with words from Belichick, Mankins' teammates and Mankins himself.