Strength of Schedule is calculated from the opponents projected fantasy points allowed for the WR position. The easiest rating is 1 which gives the player the advantage against the defense and indicates an easy opponent, the most difficult rating is 10 which gives the defense the advantage and indicates a tough opponent.
His hamstring still isn't 100% but he's one of the toughest players in the league. He'll give it a go again but is a risky start due to matchup and his hamstring issue. Consider other options if you have them.
Boldin, who will turn 35 years old during the season, has found the Fountain of Youth in San Francisco as he's posted back-to-back 80-plus catch seasons for the first time since the 2008-9 seasons. Boldin is a savvy veteran who runs precise routes and knows how help his quarterback when things break down. With quarterback Colin Kaepernick working this off-season on becoming a better pocket passer, we expect Boldin to continue to be his favorite receiver when the 49'ers need a veteran to make a play.