Why don't we take that one step further and say fighting to the death. I'm afraid I wouldn't be allowed to play Earthling sports even if I cared enough to try. I believe they'd call me a cheater. [How they let Yamcha play baseball without getting called out is beyond him. But Yamcha probably restrains himself much better than Vegeta would.]

Besides, if those sports are as boring to play as they are to watch then count me out.