This is primarily for Impossibles. I don't see an "attach file" button on PMs so I decided to make a thread. Players stay on the DL even when their time runs out. In other words: If you put a player on the 15 day DL and the sim is for 18 games, then they'll still be on the DL when the sim is over...they just won't have any time left as the sim was for more than 15 days.
See attached screen shot (click once to view and then double click to see full-size). You have 3 options really.
1) They can continue to sit there.
or
2) You can put them back on the DL with more time (15 or 60 day DL).
or
3) You can put them back on the active roster if you want, but will need to send a player down if your roster is at 25 already.
The game will only let you do option 2 if your roster is less than 25. Basically, I have to move them off the DL to put them back on if you want to add the days (15 or 60). You can just leave them there and they stay there until you make a move with them.
As a reminder, the game won't allow you to demote an injured player from MLB to the minors or from the DL to the minors. It just won't allow it. It does allow you to promote injured players (DL to MLB or AA to AAA for example). It also allows you to promote/demote injured players within the minors. It's just how the game works. I didn't design it. You really can learn a lot by owning the game and playing around with it though.