The day of my son's games, I will always say " Just go do your thing." When game is over, I will not mention game to him. I let him bring it up to me. He has coaches on the field and teammates in teh dugout; I am dad. If he asks my opinion, I give it.
What is great is that now he is in college and he calls me after every game to talk about the game. If game is streamed, I can ask specific questions about what kind of pitch did they get you on when you rolled over or what pitch was that you took yard, etc. I'm not gonna lie, my wife says I am like a little school girl when I see he is calling to talk shop with me after a game.
Sometimes he doesn't want to say much and that is cool too. He will just give basics and I move on.