Strength of schedule is calculated from the opponents projected fantasy points allowed for the WR 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.
After three straight 1,000-yard seasons the wheels fell off big-time in 2014. Johnson got fat off his big contract and admitted to failing to put in the necessary work last off-season. Johnson was traded to the 49ers this off-season where he will need to put in the effort to impress the 49ers. San Francisco didn't give up a lot for him and the Bills, fresh off their Sammy Watkins acquisition, apparently felt the time was right to ship Mr. Johnson to the West coast.