It's the All-Star Break - will AAA SP Wil Radlosky develop more if I promote him to ML now or should I leave him in AAA for the rest of the year?

My ML team isn't anything special so winning games isn't the goal - maximizing Radlosky's development is.

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Thanks!

Fundamentally, player development is a function of coach quality and games played. So if he's in fact going to be a starter at the ML level and your PC in ML is better than AAA, then it should help to promote him. How much this will help, I don't really know, but that's the theory at least. Personally, I'd wait until next season after the completion of 20 AAA games to minimize service time because I don't think the impact is going to be noticeable enough to justify losing one year of control.

If you are in contention and he is better than another SP in your rotation, go for it. If rebuilding or not contending, wait until next season. If you promote now and aren't contending, you waste a season of control of the player.