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World Progression of the 100 yard Dash
The 100 yard dash is a track and field event of 100 yards or 91.44 metres. It was included in the decathlon of the Olympics and has been a common racing distance for years. It is not generally used in international events (having been replaced by the 100 metre sprint). However, it is still occasionally run in the United States in certain competitions. 100 meters equals 109.36 yards; 100 yards equals 91.44 meters 100 Yard Dash - Wikipedia, the Free Encyclopedia." Main Page - Wikipedia, the Free Encyclopedia. Web. 12 Apr. 2010. .

History:
The first timed 100 yard dash took place in 1870 and was won by F. C. Saportas with the World Record time of 10.5 seconds. Over the next 40 years the time would slowly decrease until the world record was 9.6 seconds ran by D. J. Kelly. After a 25 year period the World Record times start to decrease gradually starting with Eddie Tolan in 1929 who set the new world record with 9.5 seconds. Jessie Owens in 1933 tied the world record with a run of 9.4 seconds and also set the high school record for that event. It wasn’t until 1948, when Mel Patton had the new official world record with his time of 9.3 seconds. Frank Bud in 1962 set a new world record with 9.2 seconds. Than in 1962, the first ever manual time of 9.1 seconds was run by Bob Hayes. With the same time, John Carlos who in 1969 ran another 9.1 second 100 yard dash. His time was also manual but both were believed to have the world record.

Unofficial Times:
Houston McTear and Ivory Crockett both ran an unofficial and hand timed 9.0 seconds in 1974. Pharnell Raines has a hand times 9.2 second race, which would be the high school record. Times that are considered unofficial are ones that did not take place during a track meet but during personal training, or another event. Hand timing is also the same with a coach or athlete taking the time and not a machine. Especially with hand timing, the times are more likely to be false.

100 Yard Dash - Wikipedia, the Free Encyclopedia." Main Page - Wikipedia, the Free Encyclopedia. Web. 12 Apr. 2010. .

Larsson, Peter. "Men's 100 Yards." Track & Field All-time Performances. Web. 12 Apr. 2010. .