There's one round left in the U.S. Open at the Oakmont Country Club and even though Sam Burns maintained the one-shot lead he held at the beginning of the third round on June 14, numerous contenders behind him are ready to step into the breach should he falter. So far, the five-time PGA Tour winner has been rock-solid since a second-round 65.

France's Victor Perez joins rare company at Oakmont becoming just the second golfer to record an ace during the U.S. Open Championship at the venue.

Sam Burns has the lead in the U.S. Open on a rain-soaked Oakmont course and faces his biggest test. The 28-year-old from Louisiana has never contended in 20 previous majors.

Burns shot a 65 to gain a one-stroke lead over J.J. Spaun with only Viktor Hovland joining them under par as familiar faces struggled