After signing a new four-year deal in 2014, he admitted finding the lure of Sydney - and particularly a life away from the Auckland fish bowl - appealing. Ivan Cleary in his (then) new Panthers colours very nearly secured the services of the former Warriors skipper.
Yes, the Panthers haven't exactly set the world alight in the past few seasons, but I can't help wondering if Mannering would choose differently if he could go back in time.
If TV execs in Australia are to be believed, no one across the ditch wants to watch this club any more, and rumour has it that sales for Warriors jerseys have nose-dived - just like the team.
My message to Mannering would be simple: If there is any part of you longing to be in a team with genuine title aspirations, get out now.
Show me one sane, red-blooded Warriors supporter who would have any issue with Mannering saying "enough".
He has earned the right to play with the big boys - at a club that gives as much as it takes.