I've been reading the reviews that other fans had written above, and I think that they`re judging this episode in the wrong way. It's not about "DS9 playing baseball", it´s about team play, about understanding each other, about knowing our own limitations. Abount companionship, and friendship.
We see Odo as the referee, an alien from far, far away acting as the "law" in a simple earthly game. Worf, a klingon warrier with gloves, a bat and running around, with snickers.
I think that the whole episode deals with the notion of "what it's important is not to win, but to play". When Captain Sisko lets Rom enter the field, and announces his name through the speakers, and the people claps and shouts for him, was one of the most emotive moments of the whole series. I recomend to see this episode with this notion: friendship.
Watch it and tell me later...