McDowell and Johnson? Seriously?

If you are a betting man (or woman) and picked Graeme McDowell and Dustin Johnson to be among the leaders, you would be sporting a Richard Branson-like bankroll. Now, the question remains: Can these two relative unknowns really take a crack at the Open with Tiger on their heels? With Mickelson and Els fading further back, it looks more and more like it will be Tiger, Graeme and Dustin come Sunday.