Manager Neil Warnock remains hopeful the club will be able to make a few more signings in January, yet loan deals seem the most likely outcome due to the current financial landscape.
We take a closer look at the signings Boro have already made under Warnock and how they have fared – scroll down and turn the page to see them all:
5. Patrick Roberts
There was a lot of excitement when Roberts re-signed for Boro on loan from Manchester City, yet the playmaker has made just three starts since. Warnock has admitted that Roberts may return to City in January due to his lack of game time. Photo: PA
6. Duncan Watmore
What a signing Watmore has proved to be. After joining Boro on a short-term deal, the former Sunderland forward has scored four goals in five starts since his move to the Riverside. The 26-year-old has provided the pace and goalscoring instincts that the Teessiders had been lacking and is the club's joint top scorer this season. Photo: Getty Images