Managers + Coaches effects on minor league teams
 

So I am just getting into the game, and I am getting the best coaches to make sure my team has the best coaches for hitting pitching, player development mechanics aging etc.

But my main question is, do I need to get some coaches to fill these slots in the minor league teams to ensure the best growth is happening? or does the player development from my major league team trickle down into the lower levels?

If the major league coaches have no effect, is it worth it to go and make sure player development is focused in my R / A / AA / AAA teams?

Thanks

I play with historical players and my assumption is coaching doesn't affect them, or if it does the effect is so small it would be hard to detect even with a 100 replays of a season with each set of coaches. This is as it should be with historical players, even with talent change randomness enabled. The reason is that with it on, if coaches affect talent, then it isn't random anymore. But I use coaches at all levels, and try to get good ones, because it gives me something to spend money on.

OOTP is really two games, one with historical players and one with fictional players. The manual doesn't separate the two. (If it turns out the game treats real and fictional players the same I would be terribly disappointed.)