The following are known Action Replay Codes for R.B.I. Baseball 4 on SEGA Genesis / Mega Drive (Genesis).

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

Device Compatibility: Action Replay

• Outs Modifier
  FF0B9A:XX
• Strikes Modifier
  FF0B99:XX
• Outs Modifier
  FF0B9B:XX
• Team 1 Score Modifier
  FF05CA:XX
• Team 2 Score Modifier
  FF05CB:XX