Trinidad & Tobago midfielder Silvio Spann is trialling with Sunderland.
Spann has spent two weeks on trial at Sheffield United, although work permit complications have prevented him from travelling with the Blades on their pre-season trip to Ireland.
That has enabled Roy Keane to appraise a player who has won 28 senior caps for the Soca Warriors and who shone at this summer's Gold Cup in the United States.