Dustin Johnson made an eight at the par-four 14th as he tumbled down the US Open leaderboard.

…12 months ago. A run of birdie-birdie-eagle carried him clear of a seemingly rejuvenated Dustin Johnson and potentially on course for a 64 if he can par his remaining two holes when he concludes his first round on Friday morning.Former world number one and two-time major winner Johnson rolled back the years with four c…