The Chiefs will try to keep new nose tackle Kelly Gregg's legs fresh by playing him for only 25-30 snaps a game. He'll be an early-down run stuffer only, replaced in the nickel defense by a younger, more explosive player. Wallace Gilberry and rookie Allen Bailey have been the passing-down interior rushers so far in camp. Gregg is 34 with suspect knees, so it's a smart strategy. He's at his best plugging away at the run.