I know this is a crazy thought, but maybe he meant it as a compliment? I didn’t see it so I can’t see his facial expressions or hear his tone, but I know people will refer to people, particularly women, as young as a compliment. Just a thought.

See, I don't have a problem with people being called young lady in general and I know that it can be really complimentary. I just feel like in this setting it wasn't appropriate. Why would he keep "complimenting" the one player and not the others? 

I also think the way he kept using it was almost like he was saying "You're doing a great job!... for a young lady" instead of just saying "You're doing a great job!" I don't know why he kept having to point it out.