Backyard Baseball 2001

Unlock English-speaking Pablo Sanchez
At the Player Select screen, hold Shift + Enter and click Pablo's picture.
(Thanks to thugnokio@hotmail.com)

Unlock Mr Clanky
Go to the trophy case in the clubhouse and hold Shift as you click on him. (Note: This cheat only works in Exhibition Mode.)
(Thanks to thugnokio@hotmail.com)

Unlock Special Player
Enter: lemon boy when creating a new player.
(Thanks to thugnokio@hotmail.com)

Win All Levels
Kick the ball out of bounds, and press: Shift, Tab and Enter.
(Thanks to thugnokio@hotmail.com)