Steve Williams

In September 2017, Williams announced that he would no longer be working in his part-time role with Scott, saying Scott wanted to go back to having a full-time caddie from the start of 2018 onwards. He spent the 2017 New Zealand Women's Open on the bag of Danielle Kang.

With Williams as his caddie, Scott finished runner-up at the 2012 Open Championship, having led by four strokes with four holes to play before bogeying them all to lose the title by one stroke to Ernie Els. The following year Scott won the Masters, defeating Ángel Cabrera on the second playoff hole. It was Scott's first major championship and the first time that an Australian golfer had won the Masters.

Woods fired Williams and announced this publicly on 20 July 2011. Williams had caddied for Adam Scott in the 2011 U.S. Open and 2011 Open Championship. Williams released the following statement on his official website:

After his win alongside Adam Scott at the 2011 WGC-Bridgestone Invitational, Williams, in an interview with David Feherty on CBS, said "I've caddied for 33 years — 145 wins now — and that's the best win I've ever had." The following day he expressed regret for the remarks, noting they were "over the top" and saying, "I had a lot of anger in me about what happened (with Woods) and it all came out." It is estimated he earned $12 million working for Woods.

On 4 November 2011, Williams made a comment that was perceived by some as being racist towards Tiger Woods. When asked about the comments he made after Adam Scott's win at Bridgestone, he replied: "It was my aim to shove it right up that black arsehole". Williams made an apology soon after. Tiger Woods then said Steve Williams is "certainly not racist."

During an event in New Zealand in December 2008, Williams made news for comments about Phil Mickelson. According to British newspaper The Guardian he said, "I wouldn't call Mickelson a great player, 'cause I hate the prick". In a next-day interview with another newspaper, the New Zealand-based Star Times, Williams also said, "I don't particularly like the guy. He pays me no respect at all and hence I don't pay him any respect. It's no secret we don't get along either."

Williams gave NZ$1 million to a cancer ward at Starship Children's Health in 2008.

In 2001, Williams started a charitable foundation to assist junior golfers in his homeland. This charitable involvement was cited in his appointment as a Member of the New Zealand Order of Merit, for services to youth sport and recreation, announced on 4 June 2007 in the 2007 Queen’s Birthday Honours. In his free time, Williams also indulges a long-time passion for Speedway Racing, and races a Saloon car and a Super Saloon regularly during the speedway season. He was the national Super Saloon car champion for 2005/2006. He won the coveted Saloon Car title for the 2009/2010 season.

In the 2006 Ryder Cup singles match, Williams slipped while trying to clean Woods' 9 iron during the 7th hole, and ended up dropping it into the water. The club was later retrieved by a diver, and handed back to Woods on the 15th hole.

Williams, Steve; De Lacy, Hugh (2006). Golf at the Top with Steve Williams: Tips and Techniques from the Caddy to Raymond Floyd, Greg Norman, and Tiger Woods. Ulysses Press. ISBN 1-56975-527-2.

Woods and Williams' relationship extended beyond the golf course, as Woods attended Williams' wedding in New Zealand in 2005 and has attended many of Williams' dirt track races.

Early in the 1999 season at the Doral - Ryder Open, Tiger Woods' then-coach Butch Harmon approached Williams, asking if he would be interested in caddying for Woods, who had just fired his original tour caddie, Mike "Fluff" Cowan. Harmon had previously asked Raymond Floyd's permission to talk with Williams. After the event, Williams drove to Orlando to interview with Woods, who hired him on the spot.

Williams spent much of the next decade caddying on almost all of the world's major professional tours. He got steady work with several Australian pros, among them Ian Baker-Finch. During this time, he met Greg Norman, and in 1982 became Norman's regular caddie in all his events in Asia and Australia, as well as some European events. In 1988, Williams moved to the United States to become Norman's full-time caddie. However, Norman fired him in 1989. Williams said later that he had gotten too close personally to Norman. Nonetheless, the two remained good friends. Norman later said he had made a mistake and tried to rehire him several years later. Williams had not long stayed unemployed, as Raymond Floyd hired him shortly after Norman fired him. He continued to carry Floyd's bag on both the regular and senior U.S. tours until 1999.

He received his first break as a caddie in 1976, when his father arranged for him to carry the bags of Australian great Peter Thomson in the New Zealand Open. Thomson, who finished third, was impressed with the young Williams, who became his regular caddie when he played in New Zealand. The teenaged Williams also traveled to Australia on school breaks to caddie in tournaments there. In 1979, before he turned 16, he left school and moved to Europe to become a caddie on the European Tour.

Steve Williams MNZM (born 29 December 1963) is a New Zealander who has served as a caddie for several top professional golfers, most recently with Jason Day. Williams is best known for having served as Tiger Woods' caddie from 1999 to 2011. Woods was the top-ranked golfer in the world for much of Williams' tenure as his caddy.