Yahoo Sports reports: Wyndham Clark fended off charges by fellow major winners Xander Schauffele, Matt Fitzpatrick and Collin Morikawa to seize a four-stroke lead in Friday's second round of the US Open at blustery Shinnecock.The 32-year-old American led England's Fitzpatrick and compatriot Schauffele by four with Morikawa another stroke adrift.