Although strength of schedule based on last season's win-loss record is basicalcheap nfl jerseysly useless, I generate a better strength of schedule for the prior season by looking at wholesale nfl jerseys from China set of opponents and calculating their average Pythagorean Expectation in games not involving that team. For the 49ers, the strength of schedule calculations look at how each opponent performed in each of its games over the course of the season, excluding games involving the 49ers.