Louisiana State defensive back Tyrann Mathieu stretches before running the 40-yard dash during the NFL football scouting combine in Indianapolis, Tuesday, Feb. 26, 2013. (AP Photo/Dave Martin)

Louisiana State defensive back Tyrann Mathieu stretches before running the 40-yard dash during the NFL football scouting combine in Indianapolis, Tuesday, Feb. 26, 2013. (AP Photo/Dave Martin)