There was a fairly intelligent Bolton fan who called 5 Live the other week who said that despite popular opinion it was Zat Knight who's been their star defender under Coyle.
I'm with Chris on this, it's easy to knock O'Neill but Cahill didn't want to wait for his chance and was sold. If he'd have hung on six months he'd have been playing anyway. Shit happens, you move on.
And I also think big Zat was better than he 's given credit for.