The 48-year-old joined Boro in May 2018, while many supporters have criticised the club’s recruitment policy in recent years. We take a closer look at the 14 players who have signed for the Teessiders over the last 18 months – loans and permanent deals. Scroll down and flick through our picture gallery to see the full list:
13. Marc Bola - July 2019
Another player who has struggled to adapt after moving to Boro from a League One club. The 22-year-old has made seven Championship appearances this term. Photo: Getty Images
14. Anfernee Dijksteel - August 2019
The full-back has shown signs of promise since his summer move from Charlton but will now face a lengthy spell on the sidelines due to a knee injury. Photo: Getty Images