I had a similar experience in my baseball game on Wednesday... except no full-fledged fight. I was pitching, and it was a pretty close game, we were up 5-3, it's the sixth inning, and I had already hit one batter, way back in the first inning though.
6th inning, it's starting to get really hot, I'm sweating like a hippopotamus in heat, and it's getting hard to dry my fingers enough between pitches so that I can even throw the ball. Anyways, leadoff batter comes up, I throw a nasty (and I mean absolutely DIRTY) deuce that starts at this kid's left ass-cheek, and ends up over the inside corner for a called third strike... or rather, that's where it SHOULD have ended up, had the kid not panicked when the ball started heading towards his ass (and not picked up the spin on the curveball), so he crouches and ducks his head... right over the fucking strike zone.
What should have been strike three plunks him in the helmet, and he walks down to first, and I called time.
Me (trying to be respectful): Sir, that's strike three!
Kid: It hit me in the fucking head!
Ump: He was still in the batter's box... and you hit him.
I was still pissed, but I didn't feel like arguing further. So that was the end of that. I get the next two batters out, so there are two outs, and the kid who I hit is still on first. Their cleanup hitter comes up, and first pitch, BAM, I let a fastball go and it hits him square in the head. Helmet goes flying, kids start yelling, after a few seconds shit calms down, and the kid is walking to first.
Me: Hey, are you okay? (it was legitimately a bad pitch that slipped out of my sweaty fingers)
Cleanup: Oh, was that one a strike too?
Ump: Hey! He just asked you if you were okay, get to first base.
But by this point, neither of us is listening, and I walk over to the first base line, and we go face-to-face. It was at this point that I realized that he had 5 inches and 40 pounds on me. But I was even more pissed than before, so we started jawing a little bit, I told him to shut the fuck up, he tried to push me, and then my catcher and the umps broke us apart. Warnings to both teams, etc. you know the deal. And then I picked him off first and he felt like a retard. I hope.
And I led off the next inning and got plunked in the shoulder, and their pitcher got tossed... I laughed.