How To Get Mia To Marry You
First of all, you need to be Single. You should buy a one family house and a car. I had the Mansion and a Premium Sports Car. You also need to have five FULL hearts. The best way to do this is to take her out to eat (Make sure she likes the food!) or to the movies. Get an engagement ring too. (Its 10,000 dollars). In some cheats they say there is an event that makes her fall in love with you. The event occurs after all the games the regular season (It doesn't matter if you made into Postseason or not). You have to wait for her to come - it takes her awhile to find you but she will come so stay. After she interviews you she will think about how great you are. Take her on another date and ask her to marry you. She will accept and then you will find out your wedding date. Mine was the second week of January. If you do this correctly, you will have a happy life with Mia. Enjoy!

How To Get Original Pitch
When Making A Pitcher Success mode, Practice With Siitch At The Lake And After You Beat All Of Them, He Will Teach You An Original Pitch That Can Go Fast, Break Alot Or Another Of Many Choices!

MLB LIFE
When you pick the special abilities, take the 50 yard/ 5 sec. this way your created player can steal bases, hit more doubles and triples and win your team more games.

as an aside for the ladies part. Mia is a waste of time if you want to go out with her. she likes the family restaurant.
Emma is a solid girl. falls in love fast. she likes the Ethnic and Mexican restaurants. a strategy to maximize likeability is to alternate between each restaurant and it take her to one rite before a game as she will come to the game and aslong as you get a hit she'll like you more

Get Power And Contact Hitter
When Making A Fielder In Success Mode, If You Beat Siitch's Ninja Training You Will Learn Contact Hitter And if You Practice Baseball ( Still At The Lake After beating Ninja Training) Enough He Will Give You A Book He Wrote And You Will Learn Power Hitting

MLB LIFE MUST!!!
When you play MLB LIFE, at the beginning when you are choosing the guy's special abilities
ex. Fielding Wizard, big hitter etc. Chose to have the ones such as Big Hitter or something that applies to hitting because fielding doesn't help you unless you are a pitcher.

Recover Vitality
While playing MLB Succesess Mode, you should go to the hot dog stand and get Duck's Spicy Special. It only cost $4 and recovers up to 50 vitality.

Get more pro points!
Play with a guy with alot of power in home run mode, and then play over and over again at coors field, and you will get alot of points, or if you want even more points use someone with little power and try to pull the ball, and you will get more points!

Arrange team
Pick a team that has little good players like the mets so that you could then change a lot of players that are bad out and get a lot great players like Carl Crawford and Ichiro.