,
Lévis, Canada Weir turned professional in 1992, and started on the
Canadian Professional Golf Tour, where he won three events. He also played some events on the Asian PGA Tour early in his career. He first reached the
PGA Tour in
1998, but lost his playing privileges, due to insufficient performance. He had to requalify, and did so by being medalist at the final Qualifying School tournament. Weir's first PGA Tour win came at the
1999 Air Canada Championship in
Surrey, British Columbia. The victory made him the first Canadian to win a PGA Tour event in Canada in 45 years. He shared the 54 holes lead at the
1999 PGA Championship with
Tiger Woods but finished T-10. He won
The Tour Championship in a playoff in 2001. Weir began the
2003 season in impressive fashion, winning two tournaments on the West Coast Swing. He first won the
Bob Hope Chrysler Classic in
Palm Springs, California, and then followed with a win at
Riviera Country Club near Los Angeles, at the
Nissan Open. In April, Weir won the
2003 Masters Tournament at
Augusta, Georgia, one of the four
major championships. He is the only Canadian male ever to win a professional major championship. At the time he won the Masters, Weir became only the second left-handed golfer to win any of the four majors, the other being
Bob Charles, who won the
British Open forty years earlier (
Phil Mickelson,
Bubba Watson, and
Brian Harman have since won majors as left-handed golfers). Weir is a right-hander who plays golf left-handed, a trait he shares with fellow PGA Tour pro and major champion Mickelson. In June, Weir tied for third at the
U.S. Open, the second of the majors, which moved him to third in the
Official World Golf Ranking, his highest ranking. For his outstanding play in 2003, Weir won the
Lou Marsh Trophy for outstanding Canadian
athlete of the year. He maintained his position in the world's top ten ranking into
2004. In February 2004, Weir joined the ranks of a select few players including
Ben Hogan to win consecutive championships at the
Nissan Open, becoming the sixth player in Nissan Open history to notch back-to-back wins, and the first since
Corey Pavin (1994, 1995). He was the 20th player to post multiple wins at the Nissan Open. Weir went more than three-and-a-half years after his second win at the Nissan Open before his next win on tour. Working with
Mike Bennett and Andy Plummer on a new swing showed some positive results (two top tens, including a tie for eighth at
the Open Championship). While working on the swing changes, he had dipped in the world rankings to a point that he did not automatically qualify for the
Presidents Cup matches in
2007, held at the
Royal Montreal Golf Club. He got to play in the tournament he helped bring to Canada because he was picked by International team captain
Gary Player as one of his discretionary selections. This turned out to be an inspired choice as Weir went on to beat current number one
Tiger Woods in a heated match, despite his team losing the Cup. When asked, Weir enthusiastically stated,
"When I look back on my career, this may be even more special than winning the Masters." His swing changes, coupled with the momentum from his Presidents Cup performance, culminated in his first win in over three years at the
Fry's Electronics Open in October 2007. This victory in Arizona tied Weir with
George Knudson for most PGA Tour wins by a Canadian, with eight.
Golf Digest magazine of March 2010 reported that Weir had returned to work with instructor Mike Wilson, who was his coach during his most successful period in the early 2000s. Weir was going away from the 'stack-and-tilt' method and working on reclaiming his swing as developed with Wilson. In October 2010 Weir said he was planning to rely less on swing coach Mike Wilson, since he thought he did not need a teacher but ''a set of eyes, whether it's Mike or someone else
. I'm taking ownership of what I'm trying to accomplish when I make a swing ... I feel like I don't need anybody to tell me what to do. I know what I need to do,'' added Weir. In July 2011, Weir rehired 'stack and tilt' creators
Mike Bennett and Andy Plummer. Weir's 2010 season ended early with a torn ligament on his right elbow. He began
2011 on a major medical exemption, which means he would have to earn the difference between his 2010 earning and $786,977 (equivalent to
Troy Merritt, who finished with the 125th and final exempt spot on the Tour) in five starts to retain full Tour status. Otherwise, he could use one of two special exemptions he holds because of career earnings to play the PGA Tour in 2011, but that is something he hoped to avoid doing. Weir had trouble making cuts and did not finish high enough to retain significant status on the Tour, being demoted to the Past Champions category, among the lowest in the PGA Tour exemption priority rankings. Weir's caddy, from 1999 to 2010, was fellow Ontarian Brennan Little. In January 2011, Weir hired veteran caddy Pete Bender. After an injury plagued 2010 and 2011 seasons, Weir began his
2012 season at the
AT&T Pebble Beach National Pro-Am after six months out of the game recovering from elbow surgery. As Weir did not have full status on the
PGA Tour, he activated his
European Tour membership for 2012, which came after he won the Masters in 2003. He missed the cut at the
AT&T Pebble Beach National Pro-Am, finishing at +6. He missed his next two cuts on the PGA Tour following Pebble Beach but made the weekend on the European Tour in the
Open de Andalucia. Weir used a special exemption reserved for the top 25 on the career
PGA Tour money list to regain his PGA Tour playing privileges for 2013. Playing on a top 50 career money list exemption for 2014, Weir nearly earned his first win in seven years at the
Byron Nelson Championship, but finished two strokes behind
Brendon Todd for his first top ten since 2010. The runner-up finish was Weir's best result since his last win in 2007. The result elevated Weir over 350 places in the world rankings up to 238th. Though Weir missed the FedEx Cup playoffs, he finished inside the top 125 on the money list, which left him exempt for the 2014–15 season. Weir withdrew from the 2015
RBC Canadian Open, and took an indefinite leave of absence from golf competition, according to a statement he posted Friday, July 17, 2015, on his Twitter account. He called it an "extremely difficult" decision to withdraw from his country's national open. It would have been Weir's 25th appearance in the event. Weir joined the
TNT broadcast team for the
2016 PGA Championship, as an on-course reporter. Weir was named as a captain's assistant to
Nick Price for the
2017 Presidents Cup competition and to Ernie Els for the
2019 Presidents Cup. In 2019, Weir announced he would play the entire season on the
Web.com Tour, taking advantage of an exemption for former PGA Tour members aged 48 and 49 either as one final attempt to regain a PGA Tour card or in preparation for
PGA Tour Champions. Weir turned 50 in May 2020 and joined the
PGA Tour Champions. In May 2021, Weir won his first tournament on the PGA Tour Champions, the
Insperity Invitational in
Woodlands, Texas. Aside from the five-man 2010
Telus Skins Game, this was his first worldwide win since 2007. ==Personal life==