Cardinals starting pitching:
Brewers starting pitching:
Other than Montgomery I don't see a decent starter on their team. Wainwright has pitched one game and it went poorly so far. Matz is completely unreliable and is looking like a bad Lauer right now. Flaherty is closer to Junk than he is to Rea. Woodford is basically Rea on the Brewers. Mikolas is also pitching like Rea so far. The Cardinals have a bunch of #4, 5, 6 and 7 starters in the 2-5 spots in their rotation.
If Wainwright falters even a little bit and at 41 years old that is extremely possible that team has only Montgomery holding their starting rotation together. If the Cardinals do not get better results from their starting pitchers their season is done. It won't matter if their offense improves if their starting pitching also does not improve.