[AtlUmpSteve]

To add my perspective;

I agree with ^^^^. It's a decision each assignor/coordinator needs to make to gain, improve, and/or keep staff. Not all "ball" is the same, and plays into it as well. And the concept of "loyalty" plays into it as well, and not everyone sees things the same way.

I have, over the years, needed to discourage umpires from working certain "ball", because I considered it detrimental to their development as umpires. Yes, independent contractors are free to accept whatever they wish; at the same time, assignors are free to assign or not assign by whatever standards they wish to apply.

Personally, I would let someone know up front what they might be doing that might affect future scheduling. Working BETTER ball; not a problem. Working junk ball that helps foster bad habits; yes, have said so, and have dealt with accordingly.