The first two lacked the pro players that would become such an icon of the series mere years later, Baseball only allows for one-color teams instead of two, the menu navigation was completely different and did not use the streamlined forward-and-back arrow mechanic, the player stats were measured on a one-to-four scale instead of one-to-ten, you couldn't pick a home field for a season game, and several other things that would be considered major staples are completely absent (for instance, the "power-up obtained" sound).