It's just roster manipulation on your part. Some might think it's bad form. However, I manipulate the hell out of my roster. Just did it today. Had a guy on DL(-25 days) but, with roster expansion 20 games away, I didn't want to send anyone down.as my playoff spot looks pretty locked in. However, I had a 3 day injury to a player who was playing 2 of 3 due to fatigue. So I put him on the 15 day DL, where he'll rest for the stretch run, and brought the other guy back. In the real world, a player with a 2 day hangnail is not going to take the 15 DL sitting down(nor would the guy who's been healthy for 25 days have been happy with his inactivity) but, in HBD, you can do it.