This is the second-time Carroll has been involved in a fight on the training ground within weeks. He fought with Charles N'Zogbia, who is now at Wigan.
But the Toon youngster has earned a bit of a reputation.
He was on loan at Preston last season but they sent him back because he was involved in a fight with a Scunthorpe player and shown a red card.
He was also sent home from the England Youth squad for reasons unknown, when they toured Europe.
