Let's face it, it's just a likely that Duff did not sign for us because he would have been in much the same position as he as at Chelsea. Our squad is similar in depth so his chances for games wouldn't be that much better. He'd also, like at Chelsea, probably be asked to play in different positions than he prefers. He's obviously just not got the right mentality for us. I think Rafa actually did a pretty good weeding him out, if this hypothesis is true.