Height: 1.82 m (5 ft 11 1/2 in)
Weight: 75 kg (165 lb; 11.8 st)
Birthday: 12 November 1987
Turned Pro: 2006
Birthplace: Beaudesert, Queensland, Australia
Day was born in Beaudesert, Queensland, in 1987. When he was six years old his father took him to enlist as a junior at Beaudesert Golf Club. At that age Day was allowed to play six holes a day, and he quickly started to win events as he got older. After his father died, when he was twelve, Day’s mother sent him to school at Kooralbyn International School, which had a golf course attached. When the school closed, the golf coach, Col Swatton, moved to Hills International College where there was a Golf Academy. He encouraged Day to join him at the college.
In 2004, Day was victorious at the Australian Boys’ Amateur. He wasn’t just successful on home territory, he also won the Boys 15–17 division at the 2004 Callaway World Junior Championship. The following year, Day was runner-up in the Porter Cup.
In 2006 Day turned professional, and began playing PGA Tour events on sponsor’s exemptions. In five of his first six PGA Tour events he made the cut, with his best finish being eleventh place, at the Reno-Tahoe Open. Day failed to qualify for the PGA Tour for the 2007 season, but he gained conditional status to play on the Nationwide Tour. Day won his first event on the Nationwide Tour, at the Legend Financial Group Classic in July 2007. Day finished in fifth place on the money list, which meant that he qualified for the PGA Tour for the following season. He did not have a very good first season on the PGA Tour, but had conditional status for 2009. At the end of the 2009 season, Day finished in 69th place on the money list, and retained his card for the PGA Tour.
Day won his first event on the PGA Tour in 2010, at the HP Byron Nelson Championship. He also made the cut for the Open Championship that year, eventually finishing in 60th place. At the end of the 2010 season, Day finished with a 21st place ranking on the PGA Tour money list. The following year, Day finished in joint second place at the Masters Tournament. In doing so he set a record for the lowest score by a golfer participating for the first time. Day also finished in second place at the US Open. He did not win any tournaments in 2011, but he still finished the season in 9th place on the PGA Tour money list.
Day was again in contention during the 2013 Masters Tournament, but he bogeyed the 16th and 17th holes in the final round, and missed a birdie putt on the 18th. He finally ended the tournament in 3rd place. Also in 2013, Day finished in joint second place at the US Masters.
The following year, Day won the WGC-Accenture Match Play Championship, his first World Golf Championship event. At the time this win meant that he rose to fourth place in the World Rankings. In February 2015, Day achieved his third win on the PGA Tour, at the Farmers Insurance Open. This was his seventh win as a professional player. This win meant that Day rose back up to fourth place in the World Rankings.
At the 2015 US Open Day collapsed on the course, after suffering a bout of vertigo. Despite this, he finished the tournament, achieving a tie for ninth place.
Away from the course, Day is a family man. He lives in Westerville, Ohio with his wife Ellie and their son Dash, who was born in 2012. Tragically, in 2013, eight of Day’s relatives in the Philippines, including his own grandmother, died as a result of Typhoon Haiyan.
As of the end of 2014, Day had achieved three wins on the PGA Tour, amassing total prize money of $17,617,931.