All Working Backyard Baseball Cheats - Playstation 2

Aquadome
Hit a homerun into the pool at Steele Stadium, into the swamp at Gator Flats, and into the lake at Frasier Field. The Aquadome stadium should now be unlocked.

Barry Deejay
Have a saved game file from Backyard Basketball on your memory card.

Derek Jeter
Execute two double plays in a single game in season mode.

Mike Piazza
Hit a grand slam in season mode.

Pedro Martinez
Throw a shutout in season mode.

Randy Johnson
Get 75 career strikeouts, which includes the playoffs. If you have any other pitcher, put him in. He does not have that good Running, Contact or Defense status, but is a very good pitcher.

Shawn Green
Hit the ball to gain a base 60 times in season mode.

Better performance
Put Amir Khan and Achmed Khan on the same team and both of their skills will increase. The same happens when Ashley Webber and Sidney Webber are on the same team.

Major league players will have increased skills when playing for their real life team. For example, Randy Johnson will perform better when playing as an Arizona Diamondback.

Hitting power-ups
To get two hitting power-ups, get the bases loaded. An easy way to do this is to get some fast runners and have them all bunt. Then, get your power hitter in there and hit the ball over the fence. As soon as the last person touches the plate, you will feel a rumble that indicates you got the power-ups.