A golf ball is a special ball designed to be used in the game of golf.

Under the Rules of Golf, a golf ball weighs no more than 1.620 oz (45.93 grams), has a diameter not less than 1.680 in (42.67 mm), and performs within specified velocity, distance, and symmetry limits. Like golf clubs, golf balls are subject to testing and approval by the Royal and Ancient Golf Club of St Andrews and the United States Golf Association, and those that do not conform with regulations may not be used in competitions (Rule 5-1).

Hard Wooden balls were the first used golf balls until the early 17th century, when the featherie ball added a new and exciting feature to the game of golf. A featherie is a hand sewn leather pouch stuffed with chicken or goose feathers and coated with paint. Enough feathers to fill a top hat were boiled and placed in the pouch. As the ball cooled, the feathers would expand and the hide would shrink, making a compact ball. If there were openings in the cowhide, stitching was used to close them up. The stitches mimicked the effects of dimples, therefore, the need for a layer of turbulence around the ball was not discovered until much later.

Golf is a precision club and ball sport, in which competing players (or golfers) use many types of clubs to hit balls into a series of holes on a golf course using the fewest number of strokes.

It is one of the few ball games that does not require a standardized playing area. Instead, the game is played on golf "courses", each of which features a unique design, although courses typically consist of either nine or 18 holes. Golf is defined, in the rules of golf, as "playing a ball with a club from the teeing ground into the hole by a stroke or successive strokes in accordance with the Rules."

Golf competition is generally played for the lowest number of strokes by an individual, known simply as stroke play, or the lowest score on the most individual holes during a complete round by an individual or team, known as match play.

A ball is a round, usually spherical but sometimes ovoid, object with various uses. It is used in ball games, where the play of the game follows the state of the ball as it is hit, kicked or thrown by players. Balls can also be used for simpler activities, such as catch, marbles and juggling. Balls made from hard-wearing materials are used in engineering applications to provide very low friction bearings, known as ball bearings. Black powder weapons use stone and metal balls as projectiles.

Although many types of balls are today made from rubber, this form was unknown outside the Americas until after the voyages of Columbus. The Spanish were the first Europeans to see bouncing rubber balls (albeit solid and not inflated) which were employed most notably in the Mesoamerican ballgame. Balls used in various sports in other parts of the world prior to Columbus were made from other materials such as animal bladders or skins, stuffed with various materials.

As balls are one of the most familiar spherical objects to humans, the word "ball" is used to refer to, or to describe, anything spherical or near-spherical.

David Marshall Coulthard, MBE, (/ˈkoʊlθɑrt/; born 27 March 1971,, often known as DC, is a Scottish former Formula One racing driver .

Coulthard, who was born and raised in Twynholm, made his Formula One debut in 1994 and won 13 Grands Prix in a career spanning 15 seasons. Twice a winner in Monaco, Coulthard was team-mate to Mika Häkkinen in the Finn's two Drivers' Championship-winning seasons for McLaren Mercedes before helping establish the Red Bull team. His best Drivers' Championship finish was second in 2001.

After retiring from racing in Formula One, Coulthard continued to be involved with the Red Bull Racing team as a consultant, as well as joining the BBC as a Television commentator and pundit. He returned as an active driver in the DTM series for 2010, piloting a 2008 Mercedes-Benz C-Class for Mücke Motorsport. He has finished in 16th position in the drivers championship in both years of competing in the series.

Coulthard began karting as soon as he was permitted, at the age of 11. He raced karts for six years, moving south once he had started to win local championships. He regarded Rowrah, in Cumbria, as his home circuit. It was there that he won the Cumbria Kart Racing Club championship in 1985, a year after Allan McNish. McNish credited the start given to him, David Coulthard, and Dario Franchitti largely to David Leslie, senior and junior.

Luke Campbell Donald (born 7 December 1977) is an English professional golfer who is the current World Number One. He plays mainly on the U.S. based PGA Tour but is also a member of the European Tour. Donald had an outstanding year in 2011, winning several tournaments and awards. He won the PGA Tour money list and European Race to Dubai to complete a historic double. He is the only player to ever win both money lists on the PGA and European Tours in the same year. He was named the PGA Player of the Year and PGA Tour Player of the Year, becoming the first Englishman to win either award. He was also named the European Tour Golfer of the Year. He also became the first Englishman to win the PGA Tour's Vardon Trophy and the first golfer other than Tiger Woods to win the Mark H. McCormack Award for the most weeks at number one during a calendar year. In May 2012, Donald was awarded honorary life membership of the European Tour for his achievements in 2011.

In May 2011 Donald became the number one golfer in the Official World Golf Ranking after winning the BMW PGA Championship. He held the number one position for 40 weeks between May 2011 and March 2012 before being briefly dethroned on 4 March 2012 by Rory McIlroy. Two weeks later, Donald regained the number one ranking with his victory at the Transitions Championship on 18 March 2012. McIlroy regained the top ranking on 15 April 2012, only for Donald to claim the top ranking for a third spell on 29 April 2012. He lost the top spot again the following week after McIlroy's runner-up finish at the Wells Fargo Championship. Donald regained the world number one ranking with his victory at the BMW PGA Championship on 27 May 2012. He has spent over 100 weeks in the top-10.