TheRio Olympicssupposedly marks the end ofMichael Phelps' amazing swimming career.

I say supposedly, because after the London 2012 games, Phelps told theTodayshow, “Im done.

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Sydney 2000, Athens 2004, Beijing 2008, London 2012, and Rio 2016.

He made his debut during the 2000 Summer Games in Sydney, Australia.

He was the youngest male athlete to compete for Team USA in almost 70 years.

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USA’s Michael Phelps poses with his gold medal during the podium ceremony of the Men’s swimming 4 x 100m Medley Relay Final at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 13, 2016. Michael Phelps brought down the curtain on his glittering Olympic career when he helped the USA win 4x100m medley relay gold at the Rio Games on Saturday, taking his personal tally to 23. / AFP / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Gabriel Bouys / AFP/ Getty Images

He’s the most decorated Olympian ever.

Hes been an Olympic-level swimmer for more than half his life.

He’s set a total ofseven racing world recordsduring his career.

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USA’s Michael Phelps poses with his gold medal during the podium ceremony of the Men’s swimming 4 x 100m Medley Relay Final at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 13, 2016. Michael Phelps brought down the curtain on his glittering Olympic career when he helped the USA win 4x100m medley relay gold at the Rio Games on Saturday, taking his personal tally to 23. / AFP / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Clive Rose / Getty Images

He won eight gold medals at the games, so it clearly paid off.

Phelps' extra-long arms are perfect for swimming.

Phelps and Bowman worked together for his entire swimming career.

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BEIJING - AUGUST 12: Michael Phelps of the United States waits to receive the gold medal during the medal ceremony for the Men’s 200m Freestyle held at the National Aquatics Center on Day 4 of the Beijing 2008 Olympic Games on August 12, 2008 in Beijing, China. Michael Phelps of the United States finished the race in first place in a time of 1:42.96 and wins the gold medal and sets a new World Record. (Photo by Clive Rose/Getty Images)

His diet involved a pound of pasta and an entire pizza just for dinner.

Phelps three-month-old son, Boomer, is the first child for Phelps and his fiancee Nicole Johnson.

The adorable baby already has quite the social media following.

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UNITED STATES - APRIL 14: Swimmer Michael Phelps, a six-time U.S. Olympic gold medalist, left, speaks during a news conference with his coach Bob Bowman at the U.S. Olympic Team Media Summit in Chicago, Illinois, U.S. on Monday, April 14, 2008. Phelps won a record eight medals, including six golds at the 2004 Olympics in Athens. (Photo by Tim Boyle/Bloomberg via Getty Images)

Congrats on an amazing career, Phelps!