Triple Play Baseball

Go to the team selection screen. Hold R1 + R2 + L2 + L1 and press Up, Triangle, Right and Circle to unlock the teams of the Allstars from 1970s, 1980s and 1990s. When you have done this action correct, you will hear a sound.

Throw three strikeouts in a row with the same pitcher.

Hit two homeruns in a row with the same player.

Catch a ball that is going over the fence or make a diving catch.

Score four runs in a game with a team.

You can unlock certain stadiums by doing the following things. Note: These stadiums will appear after you complete the game you are playing in season or single mode in the stadiums option.

Island Stadium: Win by three or more runs in Pacific Bell Park (Giants), Kauffman Stadium (Royals), Edison International Field (Angels) or Coors Field (Rockies).

Space Stadium: Hit a ground rule double. Its easier to hit them on parks that have turf like the Skydome (Blue Jays) or Veteran's Stadium (Phillies).

Score ten or more runs to win a game.

Steal three bases with the same player in a single game.

Create a player and enter "SLUGGER" as a name. He will always hit a grand slam if batting with the bases loaded.

Go to create a player mode. Make a 100 ranked player. Go to One On One in Triple Play Challenge to hit homeruns.

When batting against the CPU, show for a bunt and the computer will pitch a fastballl 99.9% of the time. Your batter can hit a homer if at 75 or more power.