In 1980, Mark O'Meara turned professional and begun his career as a pro golfer. He would go on to win 16 events on the PGA Tour, beginning with the Greater Milwaukee Open in 1984. He won the AT&T Pebble Beach National Pro-Am five times, but he passed his 41st birthday in January 1998 without having won a major championship as a professional. In a late finale to his PGA Tour winning career, O'Meara won two majors in 1998, The Masters and the British Open. O'Meara's victory in the The Masters came at his 15th attempt, which is still a record. O'Meara attributed this resurgence partly to the inspiration of working with Tiger Woods, the new superstar of the game at the time, with whom O'Meara had become good friends. In the same year, he won the Cisco World Match Play Championship and reached a career best of second in the Official World Golf Ranking. O'Meara is known for competing outside the United States more often than most leading American golfers, and has won tournaments in Europe, Asia, Australia and South America. A man with a genial demeanor, he is one of the most popular figures in international golf. In the new millennium his form took a downturn and he began to struggle with injuries, but in 2004 he won an official tour event for the first time since 1998, taking the Dubai Desert Classic title, which despite being played in the Middle East is a European Tour event. In 2007, O'Meara began play on the Champions Tour; he had many top-10 finishes in his first three seasons including several runner-up finishes, but no wins. In 2010, he broke through with a win in the Liberty Mutual Legends of Golf with Nick Price, followed by his first senior major victory in the Constellation Energy Senior Players Championship.
