Check out new boys career so far in images.
Left back Andrea Dossena became Sunderland's 13th addition of the transfer window on deadline day earlier this week.
The 31-year-old joined from Napoli on a one-year deal having made more than 100 appearances for the Serie A club.
Dossena began his career with Hellas Verona and also played for Treviso and Udinese before joining Liverpool in July 2008.
He then returned to Italy with Napoli and has also spent time on loan at Palermo.
Take a look at some action shots from his career so far in our gallery above.