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Usain St Leo Bolt (; born 21 August 1986) is a Jamaican retired sprinter. He also is a world record holder in the 100 metres, 200 metres and 4 × 100 metres relay. His reign as Olympic Games champion in all of these events spans three Olympics. Owing to his achievements and dominance in sprint competition, he is widely considered to be the greatest sprinter of all time.A nine-time Olympic gold medalist, Bolt won the 100 m, 200 m and 4 × 100 m relay at three consecutive Olympic Games, although he lost the 2008 relay gold medal about nine years after due to a teammate's doping disqualification. He gained worldwide fame for his double sprint victory in world record times at the 2008 Beijing Olympics, which made him the first person to hold both records since fully automatic time became mandatory. Bolt is the only sprinter to win Olympic 100 m and 200 m titles at three consecutive Olympics (2008, 2012 and 2016).
An eleven-time World Champion, he won consecutive World Championship 100 m, 200 m and 4 × 100 metres relay gold medals from 2009 to 2015, with the exception of a 100 m false start in 2011. He is the most successful athlete of the World Championships, was the first athlete to win four World Championship titles in the 200 m and is the joint-most successful in the 100 m with three titles.
Bolt improved upon his second 100 m world record of 9.69 with 9.58 seconds in 2009 – the biggest improvement since the start of electronic timing. He has twice broken the 200 metres world record, setting 19.30 in 2008 and 19.19 in 2009. He has helped Jamaica to three 4 × 100 metres relay world records, with the current record being 36.84 seconds set in 2012. Bolt's most successful event is the 200 m, with three Olympic and four World titles. The 2008 Olympics was his international debut over 100 m; he had earlier won numerous 200 m medals (including 2007 World Championship silver) and holds the world under-20 and world under-18 records for the event.
His achievements as a sprinter have earned him the media nickname "Lightning Bolt", and his awards include the IAAF World Athlete of the Year, Track & Field Athlete of the Year, BBC Overseas Sports Personality of the Year (three times) and Laureus World Sportsman of the Year (four times). Bolt retired after the 2017 World Championships, when he finished third in his last solo 100 m race, opted out of the 200m, and pulled up in the 4×100m relay final.
Stating that it was his "dream" to play professional association football, in August 2018 Bolt began training with Australian football A-League club the Central Coast Mariners as a left-winger. On 12 October 2018, Bolt scored twice for the team in a friendly match.

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