What exactly stops him from listing one player himself? Team get's listed when the managers is dumb enough or can't decide which player to sell (or does not want to sell anyone). You have to understand that going deep into minus is not the option and you have to sell someone (there are no rich uncles in this game, that might bale you out). So the choise is to sell someone yourself or risk losing your best players. It's an easy and obvious choise.