Yahoo Sports reports: Wyndham Clark finished his darkness-halted first round of the 126th US Open with two pars on Friday morning, completing a six-under par 64 to hold a two-stroke lead at windy Shinnecock.Clark owned a four-stroke overnight lead through 16 holes but compatriot Dustin Johnson, a two-time major winner, birdied the par-three seventh and par-four ninth to trim his playing partner's edge in half.