astroscounty.com did a breakdown of the remaining games for Astros and A's:
Oakland's remaining regular season schedule:
vs Seattle (4), vs New York (3), vs Arlington (3), at Baltimore (3), at Tampa (3), vs Anaheim (3), vs Minnesota (3), at Seattle (3), at Anaheim (3).
That's 13 remaining games against teams currently with a winning record. 16 of their 28 games are at home. Oakland is 30-28 in 2018 against teams left on their schedule.
Houston's remaining regular season schedule:
vs Anaheim (4), vs Minnesota (3), at Boston (3), at Detroit (3), vs Arizona (3), vs Seattle (3), vs Anaheim (3), at Toronto (3), at Baltimore (4).
That's nine games currently with a winning record. 16 of Houston's 29 games are at home. The Astros are 27-20 against teams left on their schedule.
