Denver Broncos' Isaiah Burse looks on following NFL football rookie camp, Sunday, May 18, 2014, in Englewood, Colo. (AP Photo/Jack Dempsey)
Cleveland Browns defensive end Billy Winn (90) jokes with rookie quarterback Johnny Manziel (2) after an off-season practice at the NFL football team's facility in Berea, Ohio Wednesday, May 21, 2014. (AP Photo/Mark Duncan)