The Open Championship, or simply The Open (often referred to as the British Open), is the oldest of the four major championships in professional golf. Held in the United Kingdom, it is administered by The R&A and is the only major outside the United States. The Open is currently the third major of the calendar year, following The Masters and the U.S. Open, and preceding the PGA Championship.The current champion is Zach Johnson, who won the 144th Open at the Old Course at St. Andrews in 2015.