Indianapolis—A  s the team's rookie first-rounder in 2011, Buffalo defensive lineman Marcell Dareus played both end and tackle, and was effective at both positions. With the Bills switching to a "base" 4-3 in 2012, anticipated after the elevation of Dave Wannstedt to coordinator and then confirmed by head coach Chan Gailey last week, there's still some uncertainty about where the former Alabama star, the third pick in last year's draft, will line up.

Most scouts felt the 33-pound Dareus was a perfect "five technique" fit at end in a 3-4 last season, but he had plenty of success when he played at the "three technique" tackle spot, too.