Zach Johnson of the U.S. reacts after making his birdie putt on the 18th green during the final round of the British Open golf championship on the Old Course in St. Andrews, Scotland, July 20, 2015. REUTERS/Russell Cheyne - RTX1L37E

Zach Johnson of the U.S. savors the moment after winning the British Open golf championship on the Old Course in St. Andrews, Scotland, Monday. Reuters

South Africa’ Louis Oosthuizen walks down the seventh fairway during the final round of the British Open Golf Championship at the Old Course, St. Andrews, Scotland, on Monday.

Australia’s Marc Leishman plays out of a bunker on the 16th hole during the final round at the British Open Golf Championship at the Old Course, St. Andrews, Scotland, on Monday.

Jordan Spieth misses a birdie putt on the fourth green during the final round at the British Open Monday.

Australia’s Jason Day follows his second shot on the fourth fairway during the final round at the British Open.

Louis Oosthuizen of South Africa after hitting his tee shot on the sixth hole during the final round of the British Open.

Jordan Spieth walks off the fifth green after making his birdie putt during the final round of the British Open Monday.

Paul Dunne of Ireland hits his second shot on the fifth hole during the final round of the British Open.

United States’ Jordan Spieth plays a second shot on the second fairway during the final round at the British Open on Monday.

Jason Day of Australia watches his tee shot on the second hole during the final round of the British Open Monday.

Australia’s Geoff Ogilvy plays from the sixth tee during the final round at the British Open Monday.

Paul Dunne of Ireland reacts after his second tee shot to the second hole during the final round of the British Open golf championship in St. Andrews.

Padraig Harrington of Ireland walks down the third hole during the final round of the British Open.

Sergio Garcia of Spain reacts after making his birdie putt on the third green during the final round of the British Open golf championship on the Old Course in St. Andrews, Scotland.

Louis Oosthuizen of South Africa makes his birdie putt on the first green during the final round of the British Open golf championship on the Old Course in St. Andrews, Scotland, Monday.