I'll second the MLB Power Pros recommendation, it's by far the deepest baseball game I've ever seen and I was floored with all the options and deep stats and everything. Plus, it's just hilarious to see all the caricatures of the players. :p
It's not a graphics-intensive game 'cause it's not meant to be a realistic simulation graphically but it does things like reproduce all the parks' exact specifications and stuff. It actually fits really well on the Wii. Plus it's only $40.







