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.
Sean Lee is the Dirty Harry of IDP LB1 options. You have to ask yourself "Do you feel lucky?". When he's healthy, Lee's ability to match steady tackle production with big plays gives him top-five fantasy upside. However, staying healthy has proven to be something of an issue for the Penn State standout, and he's coming off a serious toe injury (stop laughing...it cost him 10 games). Toss in a new defensive scheme and there's some real risk with taking Lee early, but the reward could potentially be well worth it.