[2] Jordan Spieth won his first U.S. Open and consecutive major titles, one stroke ahead of runners-up Dustin Johnson and Louis Oosthuizen.

Others to win the first two majors of the year were Craig Wood (1941), Ben Hogan (1951, 1953), Arnold Palmer (1960), and Jack Nicklaus (1972).

Owned by Pierce County, the Chambers Bay course opened for play only eight years earlier in June 2007.

[3] A Sounder commuter train platform at Chambers Bay with service from Seattle was planned by Sound Transit for the tournament, but was later cancelled due to logistical and financial challenges.

Source:[8][9][10][11] Chambers Bay was subject to criticism for its bumpy greens, unfair course design, and poor accessibility for spectators.

[12][13] Former U.S. Open champion Gary Player called it "the worst golf course I might've ever seen in the 63 years as a professional golfer", and Henrik Stenson said that the greens were like "putting on broccoli".

[21][24] Friday, June 19, 2015 Masters champion Jordan Spieth shot a round of 67 (−3) to tie Patrick Reed for the 36-hole lead.

After being treated by medical personnel for several minutes, Day was able to finish the hole and made bogey, dropping to three behind and a tie for 9th place.

A bogey on the final hole by Nick Hardy, a freshman from the University of Illinois, moved the cut line to +5.

Fifteen additional players earned entry into the third round, including Ángel Cabrera, Sergio García, Colin Montgomerie, Webb Simpson, and Jimmy Walker.

[24] Amateurs: Campbell (−1), Maguire (+1), Schniederjans (+2), Hossler (+3), McCarthy (+4), Hardy (+5),McCoy (+8), DeChambeau (+9), Neil (+9), NeSmith (+9), Jones (+10), Knapp (+10), Yang (+10), Horsfield (+11), Riley (+13), Hammer (+21) Saturday, June 20, 2015 Louis Oosthuizen again had the low round of the day, 66 (−4), moving him into a tie for 5th place.

In the final pairing with Jason Day at 3 pm PDT, Dustin Johnson recorded two birdies on the front nine to take sole possession of the lead, then lost it with bogeys on three out of four holes to begin the back nine.

Spieth holed a 25-foot (8 m) birdie putt at the 16th to open up a three-stroke lead, but then three-putted for double bogey on the par-3 17th to fall into a tie with Louis Oosthuizen.

Expecting a Monday playoff, Spieth suddenly gained a one-stroke victory for his second consecutive major title.

He also became the first to win two majors before the age of 22 since Gene Sarazen in 1922, and the youngest U.S. Open champion since Bobby Jones in 1923.