At this point, with six games remaining, the Astros have only the narrowest chance of winning the AL West. They are 2.5 games behind the Rangers. If they win four of their remaining six games and the Rangers lose five of their remaining seven, the two teams tie and the Astros hold the tiebreaker.
Of course, it would be better if the Astros won out from here on. And it starts tonight against the Astros’ main competitor for the third Wild Card slot, the Mariners. The Astros are a half-game ahead of the Mariners, who have seven games to play.