ossobuco wrote: But I can't yet find online where a team's players are listed for that day - just the pitchers. It would be nice if it didn't matter...
It doesn't matter, osso, unless you want to become totally addicted to this. You get advance notice, several day's advance notice, of who the SP's are going to be for most of the week (barring rainouts or injuries).
Those can pretty much be set.
As for other players on your roster, the managers of the "real life" teams give the home-plate umpire their starting lineups an hour or so before game-time. That is made public, but I doubt that any of us here follows this game that closely to make changes that late.
You should go to Edit Lineup above your team and make sure that you put guys on the bench who play on teams that are idle on Monday or Tuesday etc and bring in players (if you think they are any good) who play on teams who are scheduled.