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.
All indications are that Starks will be released or traded before the season starts. A fresh start with a new team is unlikely to change that fact that Starks has minimal fantasy appeal.