Former Everton ace Steven Pienaar
The Black Cats have yet to make a signing this summer, and new manager Moyes has plenty of work to do in the transfer market before the deadline later this month.
He's now casting his eye over free agents, and whilst Charles N'Zogbia has been on trial with the club over the summer, another former Premier League winger has linked up with the club.
Sky Sports report that Steven Pienaar has joined Sunderland on trial, and will be hoping to win a permanent contract under his former Everton boss David Moyes.
Sunderland manager David Moyes poses
South African wide man Pienaar, 34, first joined Moyes in 2007 having signed for Everton on loan from Borussia Dortmund, and after impressing on loan, he penned a permanent deal at Goodison Park.
A move to Tottenham materialised in January 2011, but after just 18 appearances for Spurs he reunited with Moyes at Everton, rejoining the Toffees and hitting 11 goals in 54 games under Moyes before the Scot's move to Manchester United.
After an injury-hit couple of seasons - which saw Pienaar play just 17 games in two years - the former Ajax star was released by Everton this summer, but the free agent could now earn an instant return to the Premier League.
Clearly one of Moyes' favourite players over the years, Pienaar could rekindle his best form at Sunderland - but taking him on trial is wise, as the Black Cats will be able to see just how fit Pienaar is, given the huge question marks over his injury history.
Would you like to see Sunderland sign Pienaar?