By Mark Lamport-Stokes OAKMONT, Pennsylvania (Reuters) - Long-hitting American Dustin Johnson, seeking major redemption after several near-misses in recent years, won the 116th U.S. Open on Sunday amid high drama and initial uncertainty over his victory margin. In pursuit of his first grand slam crown, the world number six played clutch golf under intense pressure at brutally difficult Oakmont Country Club, finishing in style as he sank a five-foot birdie putt at the last. "Feels good, feels really good, feels well deserved," an emotional Johnson told reporters after finishing three shots in front of fellow Americans Jim Furyk (66) and Scott Piercy (69), and Irishman Shane Lowry (76).
