Did he really play for them?

Thomas Gravesen at Celtic is a surprising one to me, his time at Real Madrid has been mentioned a million times. Celtic was his next destination on a 2 year contract but they loaned him out for a second stint at Everton after 1 season and then he retired.
 
Di Canio was at Celtic? :lol:

Doesn't seem like the kind of chap that would be too popular among their fanbase...