Facebook co-founder and Meta CEO Mark Zuckerberg is back training with one of the biggest names in combat sports.
The UFC's pound-for-pound list has been heavily debated, so we decided to rank the 20 best fighters in the promotion.
Check out all the UFC on ESPN 63 facts, where Cub Swanson tied Max Holloway in one key featherweight category – and passed him in another.
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