The NFL is a league of attrition. If you don't believe me just ask any of the nine teams listed here with impact players on the injury report.
As of Friday, more than 100 players were listed on their team's injury reports with star players Calvin Johnson, Jordy Nelson, Maurice Jones-Drew and Percy Harvin among them.
Consider this the Spark Notes version of the list of dinged up NFL stars.
So before you set your fantasy lineup, here is your guide to this weekend's injury reports.