VENT: My ex's new guy is coaching our son and I wasn't consulted

Found out through our 8yo that his mom's boyfriend is the new assistant coach for his baseball team. I have NOTHING against the guy - don't even know him - but like... maybe run something like that by me first? My son will be with this person regularly.

I'm trying to be cool about it but I'm seething. She made a parenting decision involving another adult in my kid's life without mentioning it. If I did this she'd lose her mind.

She'll say I'm being controlling if I bring it up. So I'm just sitting on it. Fun times.