If we're to believe him, the fastest sprinter in world history will run the final Olympic race of his life on Friday night in Rio de Janeiro.

Jamaican-born worldwide phenomenon Usain Bolt will try to propel his country to a 4x100-meter relay gold medal.

If Jamaica wins -- and it is the favorite to do so -- Bolt will have pulled off a triple-triple.

What's a triple-triple? Simple: If Jamaica wins, Bolt will have gone three for three in his events in each of the his three Olympiads, winning gold nine times.

Usain Bolt goes for his triple-triple on Friday night in the 4x100. USATSI

He won the 100-meter, the 200-meter and the 4x100 in 2008 in Beijing.

He repeated the feat four years ago in London.

And now -- having won the 200-meter gold on Thursday and the 100 earlier in the week -- on Sunday, he's one race from perfection, immortality, you name it.

He's already the first athlete in history to ever go back-to-back-to-back in the 100 and 200. This is merely the final achievement to unlock.

If he does it, his nine golds will match American Carl Lewis and Finland's Paavo Nurmi for the most golds ever by a track and field athlete.

It's so good, so perfect, it will make most of the world hope for Bolt to go back on his word and return for one more Olympiad, the 2020 Games in Tokyo. But he's said this is it, and a triple-triple would undeniably be an incredible way to wrap up one of the most captivating and electrifying careers ever in sports.