In K-ForCE, you must put in a number, player name and position for the players on both teams. If you don't know or don't care to track the opponent players, you still must enter something in for them. You can fill in your opponent’s info in after the game or you can enter fake info for their team. You must also use all the common baseball positions when making the opponents lineup, players not assigned a fielding position should be assigned X or DH.