Jordan Spieth's has been named the PGA Tour's Player of the Year, giving the American further recognition to what has already been a record-breaking season.
The 22-year-old looked set to be challenged by PGA Championship winner Jason Day for the prize after the Australian claimed four wins in six starts to temporarily move to world No 1, but Spieth's dominant win at the season-ending Tour Championship secured him the trophy for the first time.
Spieth also beat off competition from Players Championship winner Rickie Fowler and last season's player of the year, Rory McIlroy, having secured five titles in a history-making 12 months.
Just how good has Spieth's season been? We look back at what has been a memorable 2015…
Beginning the season as the world No 9, Spieth made a steady start to the year with tied-seventh finishes at the Waste Management Phoenix Open and the AT&T Pebble Beach National Pro-Am sandwiched between a missed cut at the Farmers Insurance Open.
Spieth finished one stroke short at the Northern Trust Open as James Hahn triumphed in a three-man play-off, but temporarily dropped one place to tenth in the world when a disappointing weekend left him tied-17th at the WGC-Cadillac Championship.
The Dallas-born star would have to wait until March, more than 18 months on from his maiden PGA Tour title, before he celebrated his first win of the year, holing a 30-foot putt at the third extra hole of a three-man play-off to beat off Patrick Reed and Sean O'Hair and claim Valspar Championship victory.
A runner-up finish at the Texas Open a fortnight later was followed by another near-miss the next week in Houston, where Spieth took a one-shot lead over Scott Piercy in to the final round but failed to take the title.
Spieth sunk a 12-foot putt at the last to join Johnson Wagner and JB Holmes in a three-man tie for the lead, but crashed out of the play-off with a bogey at the first extra hole as Holmes claimed victory.
Major glory
Back-to-back second places parachuted Spieth to a career-high of world No 4, only for him to move further up the world rankings by ripping up the record book at the Masters.
The first wire-to-wire winner of the Green Jacket in nearly four decades and with a record low score of 19-under-par, Spieth posted more birdies than any player in Augusta history on his way to a convincing four-shot win.
The performance bared comparisons to Tiger Woods' similarly dominant display in his breakthrough year in 1997, with the pair the only two post-war to win a major aged 21.
Although most decide to take a week off after winning the opening major of the year, Spieth stayed loyal to the RBC Heritage and became the first Masters champion to play there since 2007.
Despite not practicing and opening with a rusty-looking 75, Spieth soared back in to contention with a birdie-filled 62 although ended eight shots back in a tie for 11th.
A shock defeat to Lee Westwood saw the American make a group-stage exit from the WGC-Cadillac Match Play, before Spieth missed the cut at the Players Championship playing alongside Rory McIlroy.
Spieth took a first-round lead at the Crowne Plaza Invitaitonal but had to settle for second again as Chris Kirk claimed a narrow one-shot victory, with the then world No 2 getting off to a slow start seven days later on home soil to end the AT&T Byron Nelson in a tie for 30th.
A round-of-the-day 65 on the Sunday parachuted Spieth alongside Francesco Molinari in third spot at the Memorial, giving encouragement to take in to the US Open at Chambers Bay.
Part of a four-way tie for the lead heading in to the final round, Spieth had moved three shots clear with two holes to play until a double-bogey at the penultimate hole brought Dustin Johnson back in to contention heading to the last.
As Spieth birdied the par-five 18th, Johnson found the green in two and left himself a 13-foot putt for victory, but carded a three-putt par to hand the Masters champion a second successive major title.
Strength to strength
After a three-week break, Spieth decided not to follow many other top-ranked players and get links practice at the Scottish Open, instead returning to the venue of his first professional victory and playing the John Deere Classic.
With a career-low 61 in the third round lifting him to the top of the leaderboard, Spieth went on to claim the title via a play-off from PGA Tour veteran Tom Gillis.
A second successive win left Spieth the man to beat at St Andrews, where, with no Rory McIlroy, the 21-year-old was the bookies favourite to move a step closer to a season Grand Slam.
In a weather-affected tournament that didn't finish until Monday, Spieth was tied at the top of the leaderboard until a dropped shot at the 17th and a par at the last left him one shot short.
Following another top-ten display at the WGC-Bridgestone Invitational, the Texan went to Whistling Straits aiming to become only the third player post-war to win three majors in a calendar year.
Although he was unable to claim the PGA Championship title, finishing outright second behind Jason Day was enough to end Rory McIlroy's 54-week stint at the top of the world rankings.
Spieth lost his world No 1 position in his next start with a missed cut at the Barclays, although briefly moved back to top spot despite another early exit a week later at the Deutsche Bank Championship.
A tied-13th finish at the BMW Championship included an ace at the second and kept Spieth second in the FedExCup standings heading in to the season finale at East Lake, making him one of five players who would secure the $10m jackpot with Tour Championship victory.
With a final-hole birdie late on Saturday giving Spieth a narrow advantage heading in to the final round, the American capped his season in style by moving back top of the world with a convincing four-shot win.