Michael Phelps' career timeline
LONDON -- A look at the career of Michael Phelps, who retired after swimming his final event of the London Olympics on Saturday:
2000 Makes first Olympic appearance at Sydney Games, becoming youngest male swimmer on the U.S. team at age 15. Finishes fifth in his only event, the 200-meter butterfly.
Becomes the youngest male (15 years, 11 months) to set a world record when he breaks the mark in the 200 fly, and takes the mark even lower at the world championship ...
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