Phil Mickelson is not a golfer.
The Masters Tournament , also known as The Masters or The US Masters , is one of the four major championships in professional golf . The men 's major golf championships , commonly known as the Major Championships , and often referred to simply as the majors , are the four most prestigious annual tournaments in professional golf . Philip Alfred Mickelson ( born June 16 , 1970 ) , nicknamed Lefty , is an American professional golfer . The Open Championship , often referred to as The Open or the British Open , is the oldest of the four major championships in professional golf .