Rudy Gestede, Jonny Howson, Daniel Ayala, Marvin Johnson, Ryan Shotton and George Friend will all see their deals expire in the next few months – while there’s also uncertainty about Aynsley Pears’ situation. Scroll down and flick through the gallery to see how Boro could line-up if the aforementioned players move on:
9. RW: Marcus Browne
Had a difficult start to his Boro career and was loaned back to League One club Oxford in January. He may be able to step up to the Championship next season. Photo: Jan Kruger
10. CAM: Lewis Wing
Has been at his best playing in the No 10 position this season where he can pose a significant goal threat. Photo: Harriet Lander
11. ST: Ashley Fletcher
Britt Assombalonga isn't out of contract this summer but there has been lots of speculation about his future. Fletcher has predominantly been at his best when he's played up front on his own and is Boro's top scorer this season. Photo: Alex Livesey