Newcastle manager John Carver claims a significant number of players will leave in a summer "clear-out".
"It's pretty obvious to the man in the street and to the professionals," said Carver. "It has to be done."
Carver, who took over in January, says he has spoken to Newcastle managing director Lee Charnley to identify what needs to be done.
"There are people out of contract, there are people who are not good enough," added the Magpies boss.
Newcastle, who lie 11th in the Premier League table, entertain third-placed Arsenal on Saturday.
In the run-up to the game, Carver, 50, has expressed his anger at comments from Match of Day pundit Phil Neville.
The former Manchester United and Everton player said the Newcastle squad "had their flip-flops on" after last weekend's defeat to Everton.
"I was a bit astonished when people came out and talked about us being on the beach and wearing flip-flops," said Carver. "How can players do that when they know that everybody is playing for their futures?"