Though Pirates third baseman Pedro Alvarez, who hasn't played since Sept. 5, has been ruled out for the rest of the regular season, he could potentially return for the NLDS if the Pirates advance that far, according to the Pittsburgh Tribune. The Pirates are currently tied with the Giants for the top wild card spot.
Alvarez had lost his starting third base job to Josh Harrison even before the injury, but he had begun transitioning to first base, making five starts there.