The schedule works out perfectly for the REDS to have a 4-man rotation until May 19th.
The first time a 5th starter is needed is April 14th.
The second time a 5th starter is needed is April 24th.
The third time a 5th starter is needed is May 4th.
The fourth time a 5th starter is needed is May 19th.
The fifth time a 5th starter is needed is May 24th.
That knowledge changes the whole dynamics of the Opening Day Roster. The REDS can have an extra bat, which is great.
Assuming the health to be good for everyone, we'll have:
....as our 4 starters through May 18th, with only 3 starts needed before that by a pitcher other than them. Sounds like the perfect job for Micah Owings, who would get those 3 starts, then a 4th start on May 19th if he'd earned it by his showings in his first three starts. If not a 5th starter can be brought up May 19th, or wait until May 24th. One of the pitcher who had been pitching in AAA could get the call up with one of the AA pitchers taking his place (more likely Chapman or Thompson moving from AA to AAA).
I don't think the REDS want any of those guys listed in my AAA roster coming out of the bullpen while waiting to start games on those dates from above.
It's possible that the REDS go straight to a 5-man rotation out of Spring Training and let every one pitch every 6th day instead of every 5th day until May 19th. One reason to do that is because the REDS have too many pitchers who should be pitching at the AA and AAA level. The easiest way to solve this problem though is to assume that 20% of the staff isn't going to be ready on Opening Day and will need extended Spring Training. Only those who are truly ready will get to pitch at the start of April.
Anyone else, and the REDS are going to want to have them pitching every day.
So, to begin with the AAA roster should look like (among these 6 assuming one won't be healthy enough to be ready the 2nd Week of April):
The AA roster should look like this (among these 7 assuming two won't be healthy enough to start or be ready the 2nd Week of April):
As soon as May 24th arrives, or Owings proves he's not up to the task, there will be a trickle-up effect that clears up the logjam of pitchers.
You can't have too much pitching, so this is a very, very good thing.
I haven't seen this much "decent" pitching in the REDS' organization since I've been alive to notice (I've been noticing for about 38 years since I was 12 and had access to libraries and The Sporting News and Baseball Digest.).