Blackburn Rovers were one of several Premiership clubs who checked out the Newcastle youngster last season - but it was obviously before Paul Ince took over at Ewood Park.
Keegan is desperate for cover for Jose Enrique after the Spaniard experienced a few problems since returning to training last week.
Keegan To Offer Carroll For Warnock!
Charles N'Zogbia is good enough to fit into that position but KK is sick of the continuous moaning from the French midfielder in his quest to leave the club.
Liverpool boss Rafael Benitez is far from keen on letting Argentinian Emiliano Insua go on loan to another Premiership club.
Insua actually started for Liverpool in their friendly in Lucerne this week - and gave a goal away.
Blackburn's Rovers new boss Paul Ince is even less keen to let his left-back Steve Warnock come to St James's but Andy Carroll could sway a deal.