Position Change prior to Game
 

How can I change a players position prior to the start of a game? I don't want to change his normal position. I just want to change it for this one game.... I go to the "Lineup & Starting Pitcher " screen but cant figure out how change a players position...

7-day lineups should do the job. It allows you to have specific lineup on a specific day.

In the batting lineup on the left you can use the drop-down to change their position as well, and it won't impact the default lineup for the next game. More useful if you just want to do it as a one-off.