I don't recall saying anything about stunting development. I just don't like the idea of promoting a top prospect especially all the way from Double-A to fill in for a game. It just not the right thing to do. You call him up when your confident he has a chance to be successful and a chance to perform and play himself into a regular role.
Calling him up in September when the minor league season over is one thing. But it's Mid May.
Space can always be made on the 40-man. We have some s***** players unlikely to be claimed.