He has spent three years as a situational rusher, coming in on passing downs. He has started four NFL games. Now all Marcellus Wiley has to do is step in for the second-leading sacker of all time, Bruce Smith. "He has a chance to reach double-figure sacks, mainly because he's so relentless," coach Wade Phillips says of Wiley. The 25-year-old Wiley, who has a sociology degree from Columbia, takes an analytical approach to the game. "The 3-4 is less of an attacking scheme," he says. "You play run first, then the pass, but that's where reading your keys comes in. Sometimes you have to get through your read in a hurry and go for the passer, even though it's not a passing down. That'll put you on the road to double-figure sacks."