Young defender Daniel Dodds has committed his future to Boro with an extended contract.
The full-back, 21, who hails from Northumberland, recovered from a significant injury lay-off to make eight appearances with our Under-23s last season.
Dodds joins U23 teammate Joe Gibson in signing extended terms, while Academy products Oliver Swan, Frankie Whelan, Afonso Lindo, Sam Collins, and Ben Beals have all penned first pro deals this summer.