Sunderland's chairman-manager Niall Quinn has admitted that the time has come to bring in several new faces after the Black Cats lost 3-1 at Southend.
Quinn's side have lost all four league games this season and the Irishman is ready to take drastic action to turn things around.
"This has shown that there is a percentage of the players who are not good enough," said Quinn.
"We have tried to lift them over the past three weeks but there is a losing mentality that is rampant.
"We hope to have an influx of players this week and we hope to eradicate that losing mentality with the players that we bring in."
"It's affecting even the good players and that has to change. We've tried to change it with them, but the levels of negativity at the club are unprecedented.
"The steeliness you need to come to places like this and win isn't there. It's something that has crept in.
"There used to be a winning mentality. It seems to be all or nothing with Sunderland and you have to be a tough player to play for us."