Thanks for all the replies. At the time it felt like he was questioning our integrity. Nice to see both sides of it.

This is a good situation where a pair of "earmuffs" come in handy. Just ignore him... he is obviously frustrated with the call. I think the only mistake you made is trying to explain that your partner had a good look. Maybe he didn't??? i would just tell the kid it was a tough play and to talk to your partner about it. I stay out of it as the non-calling official.

Point taken. The player complaining wasn't the player to which the foul was called.

Yeah... sometimes you get the "big brother" player who is going to stick up for his teammates. Again, I think you can ignore this one and move on.

As MD said, the "old school" way to handle a player pissing and moaning was the "f*** you call" where you would call a strike on a pitch that wasn't really a strike. That is generally discouraged now, and there are other ways to handle it. If a batter hasn't said anything else and just says "You missed that one" like egj13 was talking about, it doesn't even get a response from me, especially at the college level. If he is persistent or tries to show you up, you can walk in front of the plate and brush it off and talk to him with your mask on. Same with the catcher if he is giving you trouble.