FILE - This Aug. 9, 2012 file photo shows Pittsburgh Steelers running back Jonathan Dwyer (27) smiling as he stands on the field before an NFL preseason football game against the Philadelphia Eagles, ... more 

FILE - This Aug. 9, 2012 file photo shows Pittsburgh Steelers running back Jonathan Dwyer (27) smiling as he stands on the field before an NFL preseason football game against the Philadelphia Eagles, in Philadelphia. Dwyer has a baby face that belies the ferocity that lies underneath. Don't let the sweet smile fool you. (AP Photo/Mel Evans, File) less