We all know that pro athletes earn bank, but which of these sports does 2021's highest-paid athlete in the world play?

MMA star Conor McGregor may have gotten knocked out in his first fight at UFC 257 in early 2021, but he didn't leave Abu Dhabi a total loser: the fighter earned an estimated $22 million for just showing up. And that's only the start. Thanks to a lucrative assortment of endorsement deals and the $150 million sale of his whiskey label Proper No. Twelve, McGregor earned an eye-popping $180 million in 2020-21.

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