Strength of schedule is calculated from the opponents projected fantasy points allowed for the LB 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.
Big things were expected from McCarthy after a rookie year in which he had 68 tackles and came on strong down the stretch. However, injuries all but wiped out his second season, and Moise Fokou was running ahead of McCarthy in OTAs. Now, with the announcement that Fokou will start in the middle in Week 1, McCarthy's IDP value is all but gone. All the talent in the world is of little use if he isn't on the field.