The following are known Action Replay Codes for MLB Pennant Race on Sony Playstation (PS1).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay, CodeBreaker & GameShark

1 Ball Walk
d01f0a1c0000
801f0a1c0004

0 Balls
d01f0a1c0001
801f0a1c0000

Never Strike Out
d01f0a1a0001
801f0a1a0000

1 Strikes = Out
d01f0a1a0000
801f0a1a0003

1 Out Swap
d01f0a180000
801f0a180003