In 1931, Guldahl turned professional. He won an event in his rookie season before turning 20 years of age, setting a record that would not be matched until 2013. In 1933, at the age of 21, Guldahl went into the last hole of the
U.S. Open tied for the lead with
Johnny Goodman. A par would have taken him into a playoff but he made bogey and finished second. After further frustrating failures, Guldahl quit the sport temporarily in 1935 and became a car salesman. Guldahl made a comeback part way through the next
PGA Tour season in 1936, won the prestigious
Western Open and finished second on the money list. He won the Western Open in 1937 and 1938 as well. That tournament was recognized as one of the world's most important events at the time, on the level of a major championship or close to it. Guldahl's manner of play was relaxed: "He paused to comb his hair before every hole, and would forestall any suspense by announcing exactly where he intended to plant the ball." Guldahl won three
major championships. He claimed the
1937 U.S. Open with a then-record score of 281. He successfully defended the national title a win at the
1938 U.S. Open. He was the last to win the
U.S. Open while wearing a necktie during play in 1938. Guldahl was runner-up at the
1937 Masters Tournament and
1938 Masters Tournament. He played on the
1937 Ryder Cup team. Guldahl reached the top in golf ahead of more famous players of his generation, including
Sam Snead and fellow Texans
Byron Nelson,
Ben Hogan, and
Jimmy Demaret, who all went on to build much longer and more productive pro careers. Guldahl's 16
PGA Tour wins all came in a ten-year span between 1931 and 1940. He put together five straight seasons, from 1936 to 1940, with multiple PGA Tour titles. Guldahl was offered a book contract for a guide to golf, taking two months to complete
Groove Your Golf, a book that used high-speed photographs of Guldahl on each page to create "flip-book" movies. After completing the book in 1939, he returned to the PGA Tour. His last two wins came in 1940. Two-time PGA champion
Paul Runyan commented, "It's the most ridiculous thing, really. Guldahl went from being temporarily the best player in the world to one who couldn't play at all." His son, Ralph, claimed that his father over-analyzed his swing and it fell apart. According to his wife, Laverne: "When he sat down to write that book, that's when he lost his game." In an interview with
The New York Times in 1979, Guldahl himself offered a different explanation for the slump in his game. When asked about destroying his talent by practicing in front of a mirror while writing the book, he responded: "Nonsense. No such thing ever happened." During the interview, he offered several reasons for retiring: he was tired of life on the road; he wanted more time with his family; and the wartime slowdown in tournaments caused his game to grow rusty and he had little inclination to train: "I never did have a tremendous desire to win." Paul Collins summed up Guldahl's decision to retire with these words: "Guldahl's fate had little to do with overthinking his game, and much to do with the untutored Dallas boy who once loved to play abandoned courses and baseball diamonds alone. Far more than fame, what Ralph Guldahl wanted was a nice, quiet game of golf." Guldahl played occasionally in the 1940s but then quit tournament golf for good, except for several seasons in the 1960s, when he played in the Masters, as an eligible past champion, without notable success. He spent the rest of his working life as a club professional. In 1961, he became the club pro at the new Braemar Country Club in
Tarzana, California, where he was an instructor until his death. Among his students was billionaire
Howard Hughes. == Personal life ==