I would have to say Baseball Superstars 2011. They added so many new things into the game and they actually put a full version of it for free on the market by accident!
Link:
https://market.android.com/details?id=com.gamevil.baseball2011.freemium&featu re=search_result
Or if downloading it from your phone make sure that this is the first line in the description, THE MOST COMPLETE BASEBALL EXPERIENCE ON ANDROID MARKET!
You will not be disappointed! I cannot stop playing this game, I am in my tenth season!
Ps..... I recommend to do the MY PLAYER mode.. season mode is rather pointless as the my player mode rants on about.