Robert Griffin III avoided serious injury after a dramatic hyperextension injury yesterday. The wording of the Redskins’ press release – a clear MRI with a knee sprain – caused some confusion initially, as the MRI technically couldn’t have been “clear” and have a finding of a ligament sprain. I think the Redskins were simply trying to reassure their fans that Griffin’s knee was clear of the most significant ligament injuries – high grade sprains and/or an ACL tear. Based on the hyperextension and knee sprain report, it’s most likely that Griffin has a low-mid grade PCL sprain. That’s just my speculation, however; we’ll hopefully get more specifics from Mike Shanahan today. It’s also too early to say anything about Griffin’s return to play expectation. If the injury is low grade, it’s possible that Griffin could play this week, but it won’t be surprising to hear anything from a 1-4 week timetable.