15 year-old Michael Phelps' first Olympic race | Throwback Thursday

15 year-old Michael Phelps' first Olympic race | Throwback ThursdaySee more

When Michael Phelps Was Just a Teenager | Before They Were SuperstarsSee more

Michael Phelps Broke 1st World Record at Age 15 At 2001 Men's 200m Butterfly final World ChampionshiSee more

Michael Phelps' First Olympic Final at Sydney 2000 | Olympic DebutSee more

Phelps vs Thorpe vs van den Hoogenband - Men's Freestyle 200m at Athens 2004 | Throwback ThursdaySee more

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Michael Phelps' 1st Olympic Gold Medal | Throwback ThursdaySee more

11 year old Michael Phelps wins 50 Butterfly - 1997See more

Michael Phelps' first Olympic race | Iconic RacesSee more

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Michael Phelps breaks 200m Freestyle World Record | Beijing 2008 Olympic GamesSee more

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The greatest swimming comeback of all time? | Throwback ThursdaySee more

Michael Phelps 15 years old 2000 US Olympic Trials 200m Fly 1'57 48See more

Sydney 2000 Olympic Games 200m Butterfly 15 Year Old Michael PhelpsSee more

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11 year old Michael Phelps wins 200 Freestyle - 1997See more