Get lots of points
Start a two-player game and proceed to strike out every batter on each side until 
the bottom of the ninth inning. When you've got two outs at the bottom of the 
ninth, walk the next four hitters to earn enough points to buy 100 card packs, 
which should get you almost every card. If not, repeat and get yourself more card 
packs. Note: This doesn't include special cards earned in Scenario Mode.

Late swing
When you are at bat, for some reason when you press Swing, the player will 
actually swing a moment after it is pressed resulting in a swing and a miss. You 
should press Swing in advance, preferably after the pitcher releases the ball. 

Easy homeruns
When controlling Barry Bonds at bat, press the Square so that you are on "Power" 
and not "Contact". When you are on "Power", only the yellow box will appear, and 
when you are on "Contact", there will be a shaded area covering the yellow box. If 
the pitch is up and in, move the box there and swing. It will almost always be an 
automatic homerun.

Taunt crowd:
When playing an away game, hit a homerun and press L3 when running the bases 
to taunt the crowd. 

Homerun celebration:
Press R1 when you are running the bases after hitting a homerun. Your player will 
blow kisses to the crowd. If you continue pressing R1, your player will jump on 
home plate. 

Easy homeruns:
When controlling Barry Bonds at bat, press the Square so that you are on "Power" 
and not "Contact". When you are on "Power", only the yellow box will appear, and 
when you are on "Contact", there will be a shaded area covering the yellow box. If 
the pitch is up and in, move the box there and swing. It will almost always be an 
automatic homerun. 

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.

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. 

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. 

Slide step:
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. 

Pick off from the catcher:
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. 

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". 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. 

Change jerseys in franchise mode: 
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 X and you can change uniforms. Once you change 
lineups or pitchers, this option is no longer available; it only works for that one 
game. 

Better players:
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. 

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 win:
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.

Easy scoring at Pac Bell Park:
Try to hit the ball to the right-center field corner. If your man has speed and you 
are on third before the ball gets to the cutoff man, run home. The cutoff man 
should throw it to the catcher, and most of the time he gets down in a stance to 
block the plate. When he does this, press L2 and you will stop. When he gets out of 
his stance, continue going home and you will be safe.