Baseball has reached the final few weeks of a grueling, six-month regular season -- a time when durability matters.
But not all players who are in the lineup nearly every day are created equal, especially when the calendar reaches mid-September. That's something to consider in the playoff races that remain up for grabs.
A little background here: I looked at offensive production for the final 15 games of the regular season since 2012, the start of the second wild-card era. Games are managed differently in September thanks to increased roster size, and those seasons reflect a more uniform number of playoff teams, as well as possible clubs in realistic contention.