Merion (980), Golf (642), Club (517), Open (283), U.S. (172), Ardmore (141), at (90), golf (69), Phil Mickelson (66), Billy Horschel (64), Horschel (61), Pa. (59), Mickelson (57), 2013 (56), hole (55), round (40), Phil (36), Championship (34), Country (29), Course (28), Billy (26), tied (20), hosted (20), shot (20), championship (19), final (17), major (17), course (17), tournament (16), during (14), East (13), 16 (13), United States (13), US (12), States (12), second (11), June (11), the (9.9), United (9.8), his (9.1), first (7.8), area (7.0), in (6.9)