Carver was the Magpies’ first-team head coach during the second half of the 2014-15 campaign following the departure of Alan Pardew to Premier League rivals Crystal Palace.
Former Newcastle midfielder Bowyer has defended Carver and has told talkSPORT: “It just shows you that the criticism John Carver was getting last year was unjustified. You can only work with the squad you’ve got.
“Steve McClaren has bought in some of his own players and one or two of them look ok, but to bring in foreign players again when you already had loads there - it’s a tough league to hit running and not a lot of players get it.”