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The Black Cats are searching for as many as five new arrivals during the winter trading period, with Parkinson set to make his mark on the squad after some disappointing resuls of late.
But who could be arriving at the Stadium of Light? Scroll down and click through the pages to see who has been linked with Sunderland:
21. Ollie Rathbone (Rochdale)
Football Insider have credited Sunderland, Blackburn Rovers, Ipswich Town and Portsmouth with an interest in the creative midfielder - who has shone for the Dale this season. | Getty Images Photo: Laurence Griffiths
22. Zach Clough (Nottingham Forest)
Sunderland were believed to have enquired about the availability of the Nottingham Forest striker, but Parkinson has denied any interest in the forward - whom he managed at Bolton Wanderers. | Getty Images Photo: Alex Livesey
23. Liam Bridcutt (Nottingham Forest)
Similarly to Clough, Bridcutt was understood to be on the Black Cats' radar - but Parkinson has again denied a deal will be completed this month. | Getty Images Photo: Stu Forster
24. Greg Docherty (Rangers)
The attack-minded midfielder has been linked with Sunderland and Charlton, with Parkinson confirming he had held 'initial talks' with the Ibrox side over a move. | Getty Images Photo: PAUL ELLIS