This would never happen, but what about a three games in two days scenario? Double-header wild card play in games starting Thursday 9/29. extremely pressurized meaningful baseball ALL DAY LONG. Stagger the two series so you have one at 1, two at 4, and a nightcap or something. Then if you need the third game, which essentially becomes the one game play-in, play it on Friday. Winner flies to the division winner to start the LDS on Saturday.