The list, which was compiled by Business Insider, consists of 50 athletes who are considered to be unstoppable, and the best at what they do.
Rousey was chosen over athletes such as Lebron James, Serena Williams, and Cristiano Ronaldo due to her dominance in the Octagon, the likes of which have never been seen before.
Rousey, who has yet to be defeated after 11 fights, recently made history by breaking the record for the fastest title defence when she beat Cat Zingano in 14 seconds at UFC 184.
It was after this fight that questions were raised whether Rousey should be moved into the men's division as eight out of her 11 bouts have lasted less than a minute.
"No athlete is the best in their sport by a wider margin than Rousey," the Business Insider article said. "Her two wins in the past year have lasted an average of 15 seconds. The UFC made her its first female fighter ever.
"In her five UFC fights, only one opponent has made it out of the first round without getting knocked out of submission. She's not just undefeated; she's effectively untouched."
The other stars mentioned above finished second, third and fourth respectively, while Jamaican sprint sensation Usain Bolt rounded off the top five.