Before playing in a franchise mode game, go to quick play, and on the team's options highlight "Change Uniform". Go back, exit quick play, load the franchise, and when you get to the play game screen on options, your pointer will be on the blacked out uniform part. Press A and you can change uniforms. Once you change lineups or pitchers, this option is no longer available; it only works for that one game.
Demote player without other teams claiming him off waivers
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.
Easy points
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. 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.
Free balls
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.
Restore pitcher's energy
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.
Throw hard 4 seam fastball correctly
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.
View player's energy in franchise mode
When at the main menu in franchise mode, go to "GM Office", then "Roster Management", then "Disabled List". 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.