There are pre-season games (Spring Training) at both Disney's WWoS and the Kissimmee Sports Arena, where Atlanta and Houston respectively play in March each year. Sadly, there isn't even any minor league baseball in Orlando once the season starts (in April, through to end of September), but the Tampa Bay Devil Rays do offer Major League Baseball at Tropicana Field in St Petersburg, and their games are usually cheap and easy to get tickets for. It is a little bit of a hike from Orlando, but it makes for a good day out if you go in the morning and spend some time on the beaches or in St Pete's before the game (usually at 7pm). If you arrive a couple of hours early, you can also watch batting practice, which is quite fun, and the players often chat to fans then, too.