Greg J. Chalmers (born 11 October 1973) is an Australian professional golfer who has played on both the European Tour and the PGA Tour.
Chalmers was born in Sydney. He won the 1993 Australian Amateur and the 1994 French Amateur.
Chalmers turned professional in 1995 and made a strong start to his professional career, winning four times in Australia in the next few years, including the 1998 Australian Open. In Europe he won the second-tier Challenge Tour's Challenge Tour Championship, in 1997 and finished 25th on the European Tour Order of Merit in 1998. The same year he finished fourth at the PGA Tour's Qualifying school to win a PGA Tour card for 1999.
A poor 2004 season saw him lose his card, but he won the 2005 Albertsons Boise Open on the Nationwide Tour and returned to the main PGA Tour in 2006. Chalmers struggled in 2006, making only 8 cuts and did not maintain his status and played on the Nationwide Tour during 2007 and 2008. He finished 8th on the money list in the 2008 season to gain his PGA Tour card for the 2009 season.
In 2011, Chalmers won the Australian Open for the second time in his career, 13 years after he won his first. He held off late charges by John Senden and Tiger Woods to claim victory. He followed this up with a win at the Australian PGA Championship, to take the second Australian major of the year. He defeated Robert Allenby and Marcus Fraser in a sudden death playoff to take the title. These wins led him to win the PGA Tour of Australasia Order of Merit. He also became only the second player to have a chance of winning the Australian 'triple-crown' but could not claim the Australian Masters title, an event that still eludes him.
In December 2014, Chalmers won his second Australian PGA Championship title in a sudden death playoff. He came from seven strokes back during the final round after a flawless round of 64 to enter a playoff with Wade Ormsby and Adam Scott on 11 under. In a marathon playoff which was the longest in tournament history, Ormsby was eliminated at the third extra hole, with Chalmers and Scott going as far as seven extra holes. On the seventh estra hole, Scott three putted from 30 feet for bogey to allow Chalmers to take the victory. This was his fifth title on the PGA Tour of Australasia and tenth overall professional level victory. He also claimed the year end Order of Merit title for the second time his career.
Chalmers started the 2015-16 PGA Tour season with only veteran member status and alternated between the PGA Tour and Web.com Tour. He earned his first PGA Tour win at the Barracuda Championship after 18 years and 386 PGA Tour starts, which was the most among active PGA Tour players without a win. Chalmers and 2013 winner Gary Woodland were tied before the 18th hole. Woodland bogeyed the last hole and Chalmers eagled the par-five 18th, which meant a six-point victory under the tournament's Modified Stableford scoring system. Previously, his best PGA Tour finishes were second at the 2000 Kemper Insurance Open and at the 2009 Buick Open. At 42, Chalmers was also the season's oldest Tour winner. He is also only the 12th left-hander to win a PGA Tour event. Prior to his win, Chalmers was 229th in the FedEx Cup and 490th in the world. The win moved him to 231st in the world and earned him a two-year exemption that also included entry into the 2016 Open Championship. Chalmers finished 142nd in the FedEx Cup and did not qualify for the postseason, but the win makes him fully exempt through the 2017–18 season.
Chalmers had a career best world ranking was 53rd in 2012. His career best FedEx Cup ranking was 35th in 2012.
Outside of golf, Chalmers runs a Dallas-area charity for autistic children called Maximum Chances, whose name is derived from one of Chalmers' sons.
Gary Woodland
Peter Lonard
Marcus Fraser
Henrik Bjørnstad