Is Papelbon The Same Papelbon?

To open the show today, Felger and Massarotti discussed Papelbon's blown save and the Sox 2nd straight loss to the Colorado Rockies. After blowing a save, the Papelbon bashing has begun. What has happened to Papelbon? Why isn't he the same pitcher? Felger believes that save percentage is the best way to grade a closer. Papelbon has always had a good save percentage. What has change with his stuff?
Opening Segment of Felger and Massarotti: