EA Dream Team in Underwear:
     At Main Screen (Team select), just press 1, 2, 1, 2, SHIFT CTRL.

Hidden Stadiums:
     At Main Screen press 1, 2, 1, 2, CTRL, 2, 1.

Automatic mammoth home run:
     When  the player information box comes up, type in and hold 1, 2,
3, 4 then press Up, Space, Left, Right, Shift, Alt, Down, Ctrl.

Automatic strike out:
     If  the  batter misses the first pitch, type, and hold 1, 2, 3, 4
then press Ctrl, Down, Alt, Shift, Right, Left, Space, Up.