#2. Paulo Costa
When Israel Adesanya put an end to Paulo Costa's undefeated record at UFC 253, the excuses that the Brazilian offered for his poor performance were numerous. Costa's most damning excuse was that he'd consumed an entire bottle of wine before the fight as a sleeping aid to overcome his troubles falling asleep.
When fans ridiculed Costa's reasons, the Brazilian leaned into the absurdity of his excuses by patterning an online persona after it.
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Since then, 'Borrachinha' has become a propagator of memes that have quickly earned him a reputation as one of the funniest fighters on social media. He's made memes of himself messaging the wrong people who share the same name as fellow fighters.
There was also his recent tweet which included a picture of himself in front of a clip of Luke Rockhold's post-fight interview after their fight, which he captioned by explaining his disappointment over being unable to take a picture with his foe.
#1. Derrick Lewis
Two-time title challenger Derrick Lewis is arguably the funniest fighter on the UFC roster. He announced his inimitable sense of humor to the MMA world with his now oft-referenced remarks about his overheating groin during his post-fight interview with Joe Rogan at UFC 229. This was after he defeated Alexander Volkov with a vicious knockout in the dying seconds of the bout.
However, the humor 'The Black Beast' exhibits on social media far eclipses that. In 2019, he infamously tweeted that if anyone was spending Christmas alone, he was in need of chairs to borrow.
Furthermore, he once tweeted a South Park video of an angry Mickey Mouse assaulting a parody of the Jonas brothers in reference to Dana White confirming that ESPN/Disney executives had asked him to stand down and cancel UFC 249.