You are a baseball team. Congrats on the billions of dollars.
You have a ripe starting rotation, one of the absolute best units in your franchise’s lengthy history and the envy of all in the league. In fact you’ve got so much of a good thing, you don’t have enough spots on the roster for all qualified parties.
To add to your slate of decisions, there are no minor leagues in which to stash your excess anymore. There is no stage on which you can guarantee near replica scenarios for your reserves, no way to keep them similarly engaged.