Three of them - Robson, Chris Killen and Willo Flood - this week opted to join former Bhoys boss Gordon Strachan on Teesside, preferring the challenge of a Championship promotion campaign to Celtic's quest to unseat arch-rivals Rangers.
Of the three, Robson's defection cause most raised eyebrows with the midfielder being a regular member of the team.
Asked about Mowbray's expressed intention to make wholesale changes, he said: "You Press can make your mind up, but if a manager comes in and says he wants to take a whole new set of players in.
"I don't know, that was Tony Mowbray's decision, that's what he said. That's nothing to do with me now because I am here now and I am looking forward to trying to help Middlesbrough get back into the Premier League."