Donald has already spoken about his earlier attempt to sign him so the interest is there. We got knocked back because Howe likes having him around basically even though he's not really playing him, not sure that'll be enough for Defoe though shame to see out his last years as a player in an informal coaching role when he could be banging goals in.
Far better teams than us would be interested of course, if he was available, but at the back end of his career sentimentality might play a part you never know.