Strength of schedule is calculated from the opponents projected fantasy points allowed for the RB position. The best rating is +16 which gives the player the advantage against the defense and indicates an easy opponent, the worst rating is -16 which gives the defense the advantage and indicates a tough opponent.
Stephens-Howling's 2013 season ended before it ever really got started as he was lost for the season in Week 1. He was expected to see extensive action in the Steelers' passing game as he brings an element of excitement with the ball in his hands. He's currently a free agent but could have some upside in PPR leagues given the right situation.