Fri Mar 20, 2015 8:53 pm
From the league rules:
8) You cannot trade draft choices that you do not own. This means that if you trade a 9th round draft pick, you must release as many players as necessary to insure that you will have a 9th round pick. For example, you have a 40-man roster, and you have acquired extra 2nd, 3rd and 6th round draft picks during the year. You have also traded away a 7th and 9th round draft picks. This means you must release at least 12 players prior to the draft to ensure that you will have a 9th round pick. If you plan to continue drafting beyond Round 9, you will have to release an additional player for each subsequent round. You cannot drop more than 15 players.