It's a rumour that's been floating around for at least half a year. Apparently it stems from Mayer and Delmege not seeing eye to eye on something, but neither party has said anything in public about it, nor acknowledge it at all really.
I hope there's nothing to it because I think Grant has done a fantastic job, is great with the media and we shouldn't downplay the role he's had in lifting us back to the top. That said, I wouldn't be surprised if he is head-hunted for roles (that is assuming the rumour is bullsh*t, and Manly aren't trying to push him out)...and those roles wouldn't automatically be in the NRL, or even limited to sporting organisations. I think he's quickly building a good reputation at what he does, and I hope we keep him.