there is also a spot on the game setup page, maybe called league functions that will "set all teams to computer controlled" or something like that. And then a button to "return human controlled teams back over to human control" (something like that).
I haven't used those buttons much so I don't know if it changes what displays on your manager page when you have the computer AI controlling the team.
I will try to post a link.
OOTP Baseball Manual - Roster Functions