Position in the actual lineup listed in "My Team" page as soon as the green dot (playing) is official
In the "My Team" page you should also list the position in the lineup for every batter that's listed as playing (green dot) as soon as the lineups are sent out. Think it could be easy and useful.
What use do you see in this? The player has a list of eligible positions listed next to their name. What difference does it make which actual position they are playing in the field?