You can sign players right after the time slots officially end, that would be at midnight today. The draft will still be open for one or two more days, but after midnight you can sign whoever you want. This is how it works:
Make a new thread with your team in it, like "Washington Redskins signings". Then say "The Redskins sign Joe Smith". If you are signing multiple players, please reply every time for each player... like don't say "Redskins sign Joe Smith and Jack Johnson". Make each of them seperate posts.... I'll quote your post saying approved or denied, and if its approved you can put him on your roster.