Press R when you are running the bases after hitting a homerun. Your player will blow kisses to the crowd. If you continue pressing R, your player will jump on home plate.
Start a two player game, with only one actual player. Throw a perfect game, striking out every batter. Save the game in the bottom of the ninth inning with two strikes and two outs. Finish the game, collect your points, and save the options. Reload the game and repeat to collect the points again. Also, change to the team that you are facing and make them play poorly, allowing your original team to score a lot of runs. In the last inning, switch back to your team and claim your team's cheaply made points.
Start a game with and set the skill level on anything except "Manage Only". Pause gameplay go to "Controller Select". Switch the controller to the team that you want to lose. Then, go into "Team Management" at the pause screen. Change the pitcher and the fielders to the wrong positions. You can also put pitchers in as pinch hitters. Then, return to "Controller Select" and change back to your original team. The CPU may switch the players around, but you can put the wrong ones in again. You will not get any card points if you play the entire game with the losing team. Note: There is a slight chance of your game freezing if player positions are swapped too often.
If you are down in the count or need a quick ball, pretend to lay down a bunt. Pull back while the pitcher is in his motion. This should result in a ball being thrown. Note: This only works up to two times in an at bat.
If you have a pitcher or created player that throws a hard 4 seam fastball, always place the pitching cursor below where you want the pitch to go. The pitch will automatically rise after the pitcher releases it. However, with other pitches (curveball, slider, changeup, etc.) the ball will end up where you put the pitching cursor.
Wait until your pitcher has low energy then pause game play. If your pitcher is still on the mound, go to "Save Game and Quit", then save the game. Restart the system, and when you go to the main menu, load the game. When you finish loading, it should automatically take you back to the game, and it should show your pitcher on the mound with the full green energy bar.
Use this trick to do a slide step. When your pitcher is in the stretch, select a pitch, and before you press Pitch, hold the Left Analog-stick.
When the ball is released, hold L and the base that you would like to throw the ball to. The catcher will then snap up and throw the ball to the selected base. Note: This only works when you are pitching.
When at the main menu in franchise mode, go to "GM Office", then "Roster Management", then "Disabled List". Press X and look through your players to see which ones are tired (except pitchers). If a starting player is tired, you should bench and rest him for one game.
Select the "Extras" option at the main menu, then choose "Player Management". On that screen is a category called "Player Editor". It allows you to improve players. In season mode, go to "GM", then choose "Player Management", then "Player Editor". Note: Making a player all A+ may result in the game freezing in later innings.
Go to the player editor and make all his stats to D- so that no teams would want to claim him off waivers. When you want to promote a player back to the Major Leagues, change his ratings back to his default settings.