Good health is usually a backbone for any contending team, though it’s not an absolute. As Jonah Keri notes in his weekly MLB power rankings for Grantland, the Brewers and Indians have been amongst the league leaders in fewest DL days, yet Milwaukee’s season has been a disaster and the Tribe has just a .500 record (though they’re making a late run at a wild card spot). The Cardinals, meanwhile, have the best record in baseball despite numerous key injuries, though a 4-8 record in September could indicate these missing players and some slumping regulars are starting to take their toll.