(Reuters) - France's Gregory Bourdy led 13 players into the field for the U.S. Open golf championship next month at Oakmont Country Club in the International Sectional qualifier at Walton Heath in Surrey, England on Monday. Four-time European Tour winner Bourdy shot rounds of 67 and 68 to finish nine-under-par, two shots clear of Sweden’s Mikael Lundberg, to lead the qualifying event for the U.S. Open which takes place outside Pittsburgh starting on June 16. Irishman Padraig Harrington, announced last week as one of Darren Clarke’s vice-captains for this year’s Ryder Cup, bogeyed his final two holes to miss out on the playoff by one shot. More...