If you have a franchise on this game, go to the main menu of franchise mode. Once there, go down to "GM Office", then go to "Roster Management". Select "Player Editor" and use the Left Analog-stick to move left or right to find your franchise team. After finding your team, the game will show a list of all the players on it. Go down to any one of them and you will be able edit their attributes to make them the best as possible. Do this to every one of your team members to dominate the league.
Easy Card Points
Select quick play or franchise mode. Set the number of innings to 1 then score by any means while holding the CPU to a no hitter. When the single inning game ends, you will be awarded card points for having a perfect game and a no hitter.
Easy hits
Pause game play immediately after the pitcher releases the ball. You will be able to see the pitching icon.
Easy season win
In season mode, go to the GM office, then go to the player editor. Set all your players to A+ then go to all the other teams and make their All-Star players a D-.
Home Run Antics
After hitting a home run, press L1 or R1 while your player is rounding third to make him gesture towards the crowd. The crowd will boo if you're away and cheer if you're the home team.
Move pitch after thrown
Use the Right analog-stick to move a pitch after it is thrown.
Players will never retire
If you do not want your players to retire, go to "Edit", then lower their age.
Taunting commentary
Remain idle while pitching and the announcers will start taunting your pitcher.
Dominating team...