by Dave GoldbergFiled under: Patriots, NFL Injuries, NFL QuarterbacksTwo seasons ago, Rosevelt Colvin left the field at Gillette Stadium in the company of a trainer. A few minutes later, the press box public address system intoned: "Colvin has a shoulder injury and his return is questionable.''Shoulder? After the game -- to which he didn't return -- Bill Belichick said it was a foot and gave no specifics. Told it been announced as a "shoulder,'' the Patriots coac...