Seemed like they were prepping 4 guys as starters in the fall- Cooke, Coe, Quigley and Van Emon. 5th guy in line seemed like it might be Quinn. I’d assume that’s pretty much how they will open the season although with few midweeks at the beginning of the season that 4th guy might end up as a piggyback or bullpen role depending how games play out.
From what I recall, in the preseason prior to the start of the regular season, usually about 8 pitchers are stretched for possible use in a starting role every year. It does not necessarily mean that they will all be used in a starting role with the team.
