Not very realistic, but very addicting to say the least. I suggest you start from training and then go to world domination where you have to work your way up from the 30th team, to the 1st (all MLB teams). Pretty cool game, but it would be better if the runs would be less from both sides. As you progress in the game runs get more and more, although it's very easty to catch up (at least what I've learned for the first bit). I'm up to the Diamondbacks right now and didn't take very long to get there. Anyways, have fun!
http://www.stickbaseball.com/gameworld.php