He turned professional in 2005. He played on the
Von Nida Tour in 2006, winning two tournaments and topping the order of merit. In 2007, he played his rookie season on the
Nationwide Tour finishing 92nd on the money list. He won his maiden title on the
Nationwide Tour in 2008 at the
WNB Golf Classic by a record-equaling (with
Chris Smith) eleven shots. He finished the year 19th on the money list to earn his
PGA Tour card for the 2009 season. Leishman was voted the
Rookie of the Year in 2009 after recording three top-10 finishes, which included a runner-up finish behind
Tiger Woods at the
BMW Championship, the third of the four
FedEx Cup playoff events. Leishman subsequently qualified for the season ending
Tour Championship. He ended the year 53rd on the money list. He recorded his second runner-up finish of his
PGA Tour career at the
Farmers Insurance Open in 2010. He finished inside the top 100 on the money list in both 2010 and 2011. He reached the BMW Championship in both seasons. Leishman won his first tournament after 96 starts on the PGA Tour in June 2012 at the
Travelers Championship, coming from six strokes back of the 54 hole leaders to win by a stroke. He shot a final round of 62, which included eight birdies and no bogeys to match his career best round and second best comeback in the tournament's history. He became the second Australian to win the event after
Greg Norman in 1995. At the
2013 Masters Tournament, Leishman was the co-leader after the opening round, alongside
Sergio García, as he shot a six under total of 66. He maintained his challenge over the second and third rounds to go into the final day two strokes behind the leaders. He finished T-4 with
Tiger Woods, four shots off the lead. In July 2015, in
The Open Championship at
St Andrews, Leishman finished as joint runner-up after losing in a four-hole aggregate playoff during a Monday finish to the delayed tournament. After coming close to missing the cut after the first two rounds, Leishman shot a 64 during the third round and a 66 in the final round to finish in a tie for first place with
Zach Johnson and
Louis Oosthuizen. Leishman did have the sole lead of the Championship with six holes to go during the final round but bogeyed the 16th hole to drop back to 15-under-par and an eventual tie. In the resulting four-hole playoff, after finding a divot with his tee shot at the first hole, this led to a bogey while Johnson and Oosthuizen opened with birdies to open up a two-stroke gap over Leishman. A further bogey at the third hole left him three strokes behind on the final hole and out of contention but his tie for second place gave him his best performance in a major to date. On 19 March 2017, Leishman won his second PGA Tour event, the
Arnold Palmer Invitational. On 17 September 2017, he claimed his third PGA Tour event, the
BMW Championship with a tournament record −23. On 14 October 2018, Leishman shot a 7-under 65 in the final round to win the
CIMB Classic by five strokes and equal
Justin Thomas' tournament record of 26-under-par in 2015 on the
TPC Kuala Lumpur West course. In December 2019, Leishman played on the International team at the
2019 Presidents Cup at
Royal Melbourne Golf Club in Australia. The U.S. team won 16–14. Leishman went 1–2–2 and halved his Sunday singles match against
Rickie Fowler. In January 2020, Leishman won the
Farmers Insurance Open for his fifth PGA Tour title. Leishman shot a final round 65 to come from behind and defeat
Jon Rahm by one stroke. In April 2021, Leishman won the
Zurich Classic of New Orleans. He was partnered with countryman
Cameron Smith. The duo won in a playoff over
Louis Oosthuizen and
Charl Schwartzel. Leishman competed at the
Tokyo 2020 Olympics, held in July/August 2021, in the
men's competition, finishing 51st. In August 2022, it was announced that Leishman had joined
LIV Golf. He joined the all Australian
Punch GC team, captained by Cameron Smith, which was renamed
Ripper GC for the start of the following season. Leishman earned his first victory on the LIV Golf League in April 2025 at
LIV Golf Miami, with a one-shot win over Charl Schwartzel. ==Personal life==