Because the Rangers and the Angels play each other their final four games, the Astros still hold their destiny in their own hands. That series guarantees that the Rangers and the Angels cannot both run the table.
If the Astros were to finish 2-2, 1-3 or even 0-4, they would nonetheless have a chance to tie for or win the second wild card. At 2-2, the Astros would need the Angels to lose at least 3 and the Twins to lose at least 2 for a tie. At 1-3, they would need the Angels to lose at least 4 and the Twins to lose at least 3. And at 0-4, they would need the Angels to finish 0-5 and the Twins to lose at least 5. I am disregarding the Indians here, but they have not yet been eliminated from the wild card hunt.
If the Astros were to finish 3-1, the only way they would be eliminated is if the Rangers were to finish 2-3 and the Angels were to finish 4-1. Otherwise, they would either tie for the second wild card, win the second wild card or even wind up in a three-way tie for the division. The last scenario would occur if the Astros were to finish 3-1, the Rangers were to finish 1-4 and the Angels were to finish 3-2.
And if the Astros were to finish 4-0, they would secure either the second wild card, a tie for the division or a division title. They would win the division if the Rangers were to finish 1-4 and the Angels were to finish 3-2. They would tie the Rangers for the division if the Rangers were to finish 2-3 and the Angels were to finish 3-2. They would tie the Angels for the division if the Rangers were to finish 1-4 or 0-5 and the Angels were to finish 4-1. There would be a three-way tie for the division if the Astros were to finish 4-0, the Rangers were to finish 2-3 and the Angels were to finish 4-1.
As painful as September has been, the Astros still have the opportunity to get up from the mat and get back into this thing.