Commissions discourage strongly against even rounds. As originally pointed out, no two rounds are dead even. There's always something, even if only small, that will separate one fighter from the other. What it indicates is a sign of unsurety. An unwillingness to make up your mind. Or even a lack of concentration. When a pitcher throws a ball, the umpire has to make a call. He must be focused enough to tell you if it was a ball or a strike. He can't say, "It was too close. I can't make up my mind. Redo." Same thing with boxing. You must have total concentration. But if you've lost focus during a round, score it even. I'm not going to say it doesn't happen. When you're sitting there for 12 straight rounds and nothing is going on, you may lose focus. If your scorecard is littered with 10-10 rounds, the commission will (and should) take a look at what you're doing over there. You either (A) don't know what you're doing, (B) are totally unsure of yourself, or (C) not really paying attention. Even rounds happen. But they're rare.

I've never scored one. That's not to say they don't happen, but they should be incredibly rare.