‘Artificial turf causes wear and tear on the joints of the body, not to mention scrapes and "turf burns" to the skin during a fall or tackle. That’s why all the drills are taking place on the grass practice fields. "You want to save your knees and legs and everything," punter Chris Mohr said. "We’ve always practiced on grass. We don’t even practice on the Astroturf in Buffalo." That goes for the kickers, too. "The grass is just so much easier on the body," kicker Steve Christie said. "I’d rather stay on the grass as long as possible."’