For one round at least, Billy Horschel convinced himself that it was just another day and he was playing in just another tournament.
Good luck doing that for two more days and two more rounds, Billy, because you’re tied for the lead at the 113th US Open.
Making just his second appearance ever in one of golf’s major championships, Horschel looked right at home on Friday at Merion Golf Club. He hit all 18 greens in regulation, shooting a second-round 67 to complete 36 holes at 1-under 139.
Horschel was alone in the lead until one of the final strokes on a day that began at 7:13 a.m. First-round leader Phil Mickelson knocked in a 25-foot birdie putt on the 18th hole at 8:30 p.m., seconds after the horn blew, suspending play. Full story for BostonGlobe.com subscribers.
Michael Whitmer can be reached at firstname.lastname@example.org.