"List-or-Play" Rule
As of April 25, managers who have placed a card in a lineup cannot simultaneously list it for sale on the Manager Sales Marketplace or include it in an exchange offer (not list and play cards at the same time).
Once a sale or trade transaction is completed, the associated cards are immediately removed from the lineups and the complete lineups are no longer eligible for scoring that game week. If a manager receives a direct offer for a player card they have in a current or future lineup, that lineup will only become void if the manager accepts the offer.