[6][7] Johnson turned professional in late 2007 and earned his 2008 PGA Tour card by finishing in a tie for 14th place at the 2007 qualifying school in December.

[8][9] Toward the end of his rookie season in October 2008, Johnson won his first PGA Tour event, the Turning Stone Resort Championship in upstate New York.

[citation needed] Four months later, he won his second event at the AT&T Pebble Beach National Pro-Am, which was shortened to 54 holes when the final round was canceled due to strong winds and heavy rain.

In February 2010, Johnson birdied the final hole to defeat former world number one David Duval and two-time PGA Tour winner J.

In the last pairing on Sunday, Johnson had trouble early and never recovered; he shot an 82 and finished tied for eighth (McDowell won the championship).

Johnson broke his streak of bad luck at the third FedEx Cup playoff event of the season, the BMW Championship at Cog Hill in September.

Johnson took part in the Long Drive Contest for charity at the Hyundai Tournament of Champions in January, alongside Bubba Watson and Robert Garrigus.

He finished in a tie for second place at Royal St George's, alongside fellow American Phil Mickelson, three strokes behind champion Darren Clarke.

As a result of this second-place finish, Johnson moved to his highest spot in the Official World Golf Ranking at the time, seventh, and became the third-ranked American behind Steve Stricker and Mickelson.

Johnson won his fifth PGA Tour title at The Barclays in 2011, beating Matt Kuchar by two strokes, in the first event in the FedEx Cup playoff.

Johnson did not record a single top-20 in the remaining three FedEx Cub playoff events, and finished fourth in the final standings.

[16] Johnson incurred a back injury at home in March and missed over two months of the 2012 season, including the first major at The Masters.

Johnson won by four strokes over defending champion Steve Stricker in an event that was shortened to 54 holes due to the bad weather, mainly very strong wind that meant conditions were unplayable.

He hit his eagle putt to within 3 feet past the hole and then missed the three footer coming back to give the title to Spieth.

[27] The win was shrouded in controversy however as Johnson was given a one-shot penalty after his final round had finished due to an incident on the fifth green.

The moving ball incident sparked outrage among many of the world's top golfers with players such as Jordan Spieth, Rory McIlroy, Rickie Fowler and Webb Simpson taking to social media to criticize the USGA for its decision.

[30][31] After starting the season with two top-10 finishes in his first four events, Johnson won the Genesis Open in February by five strokes over Scott Brown and Thomas Pieters.

Prior to the 2017 Masters Tournament, Johnson fell down a staircase in the Augusta home he was renting and suffered a back injury.

The win meant that Johnson had won a title in his first 11 straight seasons on the PGA Tour, behind only Tiger Woods (14) and Jack Nicklaus (17).

In July 2018, Johnson captured his third victory of the season when he won the RBC Canadian Open by three strokes over An Byeong-hun and Kim Meen-whee, after starting the final round in a four-way tie for the lead.

It was alleged that Johnson and Brooks Koepka had to be separated after a disagreement on the evening of September 30, 2018 in the aftermath of the U.S. losing the Ryder Cup.

[43] In February 2019, Johnson won the inaugural Saudi International on the European Tour by two strokes from China's Li Haotong.

This made him the USA's fifth most successful player in European Tour history behind Tiger Woods, Phil Mickelson, Jack Nicklaus, and Tom Watson.

[46] In August, Johnson held the 54-hole lead at the 2020 PGA Championship before finishing in a tie for second place, two strokes behind winner Collin Morikawa.

[47] On September 7, Johnson won the Tour Championship at East Lake Golf Club in Atlanta, Georgia and the $15 million FedEx Cup.

On May 31, it was announced that Johnson would be part of the field for the inaugural event on the LIV Golf Invitational Series from June 9–11, sponsored by the Saudi Arabian Public Investment Fund.

[56] On the inaugural season of the LIV Golf Tour, Johnson competed for 4 Aces GC, which won the team competition in four consecutive tournaments – Portland, Bedminster, Boston and Chicago.

[61] He has also established a non-profitable organization named, Dustin Johnson Foundation, which helps youth for learning, play and contend.

1Cancelled due to COVID-19 pandemic QF, R16, R32, R64 = Round in which player lost in match play NT = No tournament T = Tied for a place Note that the Championship and Invitational were discontinued from 2022.

** Johnson was removed from the official money list for 2021–22 due to his joining LIV Golf and resigning his PGA Tour membership in June 2022.