Well racing makes for strange bed fellows. Fred needs to be with a winning team NOW. Mercedes has only one move, lose a driver to create a team. And McLaren needs better drivers in 2015 for Honda.
Since the Honda project is a gamble, Fred would be wise to look elsewhere. Remember he cost McLaren 100 million dollars! So McLaren must be in a very tight spot to consider Fred.
All Ham did to McLaren was to leave for another team.