Kaymer was born on 28 December 1984 in Düsseldorf, West Germany, he turned professional at age 20 in 2005 and is a member of the European Tour.

[1] Kaymer picked up his first professional win at the age of 20 as an amateur at the Central German Classic in 2005 on the third-tier EPD Tour.

Kaymer has won 11 tournaments on the European Tour including four in 2010 to win for the first time the Race to Dubai, formerly the Order of Merit.

Kaymer made his debut on the European Tour in 2007 at the UBS Hong Kong Open, but he failed to make the cut.

[13] He represented Germany at the 2007 Omega Mission Hills World Cup with four-time European Tour winner Alex Čejka; they tied for sixth place.

Kaymer started 2008 by winning his maiden European Tour event with a wire-to-wire victory at the Abu Dhabi Golf Championship.

Kaymer came close to picking up his third win of the year at the Alfred Dunhill Links Championship, but he fell to Robert Karlsson in a three-man playoff that also included Ross Fisher.

In 2009, Kaymer almost defended his title at the Abu Dhabi Golf Championship but finished in a tie for second, one stroke behind winner Paul Casey.

Kaymer also won the following week at the Barclays Scottish Open at Loch Lomond Golf Club near Glasgow, for his fourth career win.

[20] Finishing regulation play in a two-way tie at 11 under par, he defeated Bubba Watson in a three-hole aggregate playoff.

A week later he won the Alfred Dunhill Links Championship at St Andrews with Danny Willett coming in three strokes behind.

In January, Kaymer claimed his third Abu Dhabi HSBC Golf Championship title in four years and displaced Tiger Woods as number two in the world rankings.

At the time he was the second youngest to reach world number one behind Tiger Woods, soon surpassed by Rory McIlroy in March 2012, who gained the top ranking at age 22.

Frustrated with his disappointing results at the Masters, Kaymer looked to better shape a draw, a shot he thought he needed to be able to contend at Augusta.

[27] Kaymer missed the cut at the Masters for the fourth time in 2011 and later admitted that changing his swing for Augusta was a "big mistake".

Shortly afterwards Italy's Francesco Molinari halved the final match clinching the win for Europe and thus completed the historic comeback.

[31] In May 2014, Kaymer earned a wire-to-wire win at The Players Championship in Ponte Vedra Beach, Florida, with 275 (−13) for a one-shot victory over runner-up Jim Furyk.

He started the week with a course record-tying 63 in the first round at the Stadium Course of TPC at Sawgrass, joining Fred Couples (1992), Greg Norman (1994), and Roberto Castro (2013).

His approach shot on 18 was short of the green but he holed the winning putt for par in near darkness and avoided a three-hole playoff.

Kaymer earned a winner's share of $1.8 million, the largest of his career, and re-entered the top-50 in the Official World Golf Ranking, rising 33 places from 61st to 28th.

Kaymer was the fourth to win The Players and a major in the same calendar year, joining Jack Nicklaus (1978, Open), Hal Sutton (1983, PGA), and Woods (2001, Masters).

In October, Kaymer won the PGA Grand Slam of Golf, the annual 36-hole event featuring the year's four major champions.

Kaymer found trouble in the bunkers, resulting in a round of 75 and a fall to third place behind Frenchman Gary Stal, who secured his first European Tour victory, and world number one Rory McIlroy.

In August, after failing to qualify for the FedEx Cup Playoffs, Kaymer lost his PGA Tour status for the 2015–16 season.

[38] Looking to end a five-year winless drought, Kaymer took charge of the Memorial Tournament in June 2019, after three rounds of 67-68-66, building a two stroke advantage after 54 holes.

He soon doubled that during the early part of the final round, but faltered on the back nine, including finding the water on the 15th at Muirfield Village.

He held a one shot lead with two holes to play at the ISPS Handa UK Championship, but a bogey on the par-5 17th at The Belfry, cost him a place in a playoff and seen him finish in a tie for third-place.

Kaymer joined the inaugural LIV Golf Invitational Series, signing as a team captain for Cleeks GC.

QF, R16, R32, R64 = Round in which player lost in match play "T" = tied Note that the HSBC Champions did not become a WGC event until 2009.

* As of the 2019 season Amateur Professional Media related to Martin Kaymer at Wikimedia Commons Player in italics denotes current number one