I hate to be a jackass, but
If a player is cut as a result of a trade, no team involved in the trade (either team who traded the cut player, team who received the player, or any other parties involved in the trade who never controlled the player) can sign that player for a period of 24 hours after the trade has occurred.
Once I saw the post in the Trades forum, I came on here to claim McDyess and drop Raymond Bee.
