[Mike Reiss thinks] Sebastian Vollmer will ultimately return and help the Patriots at right tackle this season, but in watching him closely during warm-ups at practice in Tampa, he appeared stiff while running (and finished last among his teammates for what it’s worth). He also didn’t bend over to touch his toes in stretching. Don’t want to read too much into it, but I wouldn’t be surprised if loosening up his back is an issue he’s dealing with all year.