Playoff Rotation

With one week to go in the regular season and the AL #1 seed all but wrapped up, how do you think the Astros rotation, and bullpen for that matter, will look like?

Obviously we have Verlander, McCullers, and Valdez as our top 3 but the 4th spot is not as clear. Javier is killing it recently but would they prefer him out of the pen and have Garcia or Urquidy be the 4th starter? Spoiled with starting pitchers, a great problem for the postseason.