In the six games he has played , that number falls to 3.5 yards per rushing attempt .
In the two games Heyward missed because of a hamstring injury , the Steelers ( 4 - 4 ) allowed 5.56 yards per carry .
In the six games Heyward has played , that number falls to 3.5 yards per rushing attempt .
In the two games Heyward missed because of a hamstring injury , the Steelers ( 4 - 4 ) allowed 5.56 yards per carry .