There wasn't much debate in the Chicago clubhouse who would be getting the ball to open the playoffs other than Luis Castillo. He's rested, and he's ready. He'll be the only RHP in the rotation for the playoffs, unless things don't go well for Sears or Skubal who would both be candidates to be replaced by Oviedo who pitched well enough during the regular season, but just isn't needed.
Castillo-RHP
Snell-LHP
Sears-LHP
Skubal-LHP
I already sent my MP out so hopefully you have my rotation. From memory, I think it's:
Nola
E Perez
Montgomery
DeSclafani
Wacha
Perhaps someone who has the updated MP can confirm this (my DMB is at the office and I'm at home).