http://iscoresports.com/

Here is the situation. A make a defensive sub in right field. However, I want the person that I just subbed in to switch positions with the center fielder. How do I make that move in the score book?

Just tap the Center Fielder, then select the player that is currently in right (or was in right), then tap right field, and tap the player that you want to come in to that position.

See the following section of the iScore documentation for more information:

http://iscoreleagues.com/manual/#h.lo6n1kc4tfd