The Panthers concluded their summer school workouts Thursday.  The OTAs were scheduled to last until next Wednesday, but coach John Fox continued his tradition of excusing players a week early.  Fox says he was happy with the work the team put in the last three weeks.  Quarterback Jake Delhomme did his first extensive work in the practices as he continues to recover from elbow surgery.  Players will now get a little more than a month off before reporting for training camp in late July in Spartanburg.