Celtic linked with ex Middlesborough Centre Half Chris Riggott. Don't know much about him but he's only 31 and has played alot of Premiership football and also played in the UEFA cup final with Middlesborough. With Big Dan out for another 8 weeks i'd get him in as surely he's better than Loovens who is our only cover in that department right now.
I remember him when he was younger, had the potential, but kept picking up injuries. Aint played many games in the last 5 years.