Flyers defenseman Chris Pronger is progressing nicely from offseason back surgery, but he may miss the start of training camp, general manager Paul Holmgren has acknowledged. Pronger had disc fragments in his lower back removed on May 12 and underwent surgery to repair a broken hand on March 15. According to Holmgren, Pronger was examined by a back specialist and a hand specialist last week and was given permission to step up his rehab.