Boss Confirms Interest In Celtic Defender

However, the Black Cats boss has ruled out any swap deal that would involve full-back Julio Arca going in the opposite direction to Parkhead.

"Stephen Crainey is somebody we have looked at," McCarthy told the Sunday Sun.

"I have people looking at players up in Scotland and he's one of a few I have my eye on.

"I'm speaking to Premiership managers about which players they're going to release with a view to next season.

"Things might not be immediate, but I am looking at players who I think might be able to do a job for us in the long term."