Zach Johnson wins the British Open in a playoff

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ST ANDREWS, SCOTLAND - JULY 20: Zach Johnson of the United States signals from the 18th tee during the final round of the 144th Open Championship at The Old Course on July 20, 2015 in St Andrews, Scotland. (Photo by Streeter Lecka/Getty Images)

ST. ANDREWS, Scotland  – Zach Johnson has won his second major title at the British Open, beating Louis Oosthuizen and Marc Leishman in a four-hole playoff at St. Andrews.

Johnson edged Oosthuizen by a stroke when the South African missed a 12-footer birdie putt at the 18th hole. Leishman finished three shots back Monday evening.

Johnson added to the Masters title he won in 2007.

It was Oosthuizen’s second straight runner-up finish in a major. He finished one stroke behind Jordan Spieth at last month’s U.S. Open.

Spieth missed the playoff by a stroke. His hopes of pursuing a historic Grand Slam at next month’s PGA Championship were doomed by a bogey on the 17th hole in regulation, where he missed an 8-foot putt. He had won the Masters and the U.S. Open, giving him a shot at joining Ben Hogan as the only golfers to win the first three majors of the year.

Jason Day also came up one shot shy of the playoff.