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RIO DE JANEIRO, BRAZIL - AUGUST 18:  Ashton Eaton of the United States celebrates during the Men's Decathlon Pole Vault on Day 13 of the Rio 2016 Olympic Games at the Olympic Stadium on August 18, 2016 in Rio de Janeiro, Brazil.  (Photo by Alexander Hassenstein/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 18:  Ashton Eaton of the United States celebrates during the Men's Decathlon Pole Vault on Day 13 of the Rio 2016 Olympic Games at the Olympic Stadium on August 18, 2016 in Rio de Janeiro, Brazil.  (Photo by Alexander Hassenstein/Getty Images)

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    US wins decathlon gold in back-to-back Olympics

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US wins decathlon gold in back-to-back Olympics

Ashton Eaton wins decathlon gold. Eaton is the first man to retain the Olympic decathlon title since 1984.

US wins decathlon gold in back-to-back Olympics

Ashton Eaton wins decathlon gold. Eaton is the first man to retain the Olympic decathlon title since 1984.