Martin Kayner finished on -9 to secure a second career major title by the fourth-highest winning margin ever at the US Open at Pinehurst.

Leading overnight by five shots, the German extended his lead to eight as the chasing pack including American trio Rickie Fowler, Erik Compton - who were tied for second on -1 - and Dustin Johnson all fell back in the final round.

The 2010 PGA Championship winner claims his second major tour win of 2014, after prevailing at the Players Championship.

Sweden's Henrik Stenson (+2) was the highest finishing European, followed by defending champion Justin Rose (+3) and fellow Englishman Ian Poulter (+4).