And while some have proved to be successful additions, others are best left forgotten with business mixed to say the least.
Here, we take a look at EVERY player to have been signed by the Black Cats in January since their drop into League One - and whether they can be considered a success or not:
9. Declan John
Similarly to Smith, John failed to even make the bench during his time on Wearside having been brought in to provide cover for Denver Hume. VERDICT: MISS Photo: Stu Forster
10. Antoine Semenyo
It was something of a shame that we didn’t get to see more of Semenyo, given that he evidently brought attributes to the table that were lacking elsewhere in the Sunderland squad. He made just seven appearances, mostly from the bench, and so his impact was limited. VERDICT: MISS Photo: Frank Reid
11. Bailey Wright
One of the club’s better January recruits of recent times, Wright has become a regular in the side with his influence on and off the pitch clear to see. VERDICT: HIT Photo: Frank Reid