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But all hell broke loose when Jake, 24, squared off with the 50-0 fighter during a media row and stole Mayweather's cap before running off.
The YouTuber-turned-boxer didn't get all that far though and after Mayweather's bodyguards got involved, Money cracked Paul with a right hand that was as clean as a whistle.
Footage taken up close and personal during the brawl shows the moment Mayweather struck Paul.
With no gloves, you can hear the sound of Mayweather's fist colliding with Paul's face. After coming out of his three professional fights without a mark, 'The Problem Child' was caught with a proper dig last night.
Logan ended up jumping in when he saw someone restraining his brother, who was eventually ushered away from the melee but not before getting hit again.
An incensed Mayweather was still on the hunt for Paul, shouting "I'm going to kill that motherf*****!" as he stormed around the tunnels of the stadium.
Jake later showed off a black eye, busted lip and damaged tooth that he claims was caused by one of Mayweather's many bodyguards.
"Honestly have had three easy fights as a pro so been itching for some real action," he wrote on Twitter.
"One of Floyd's 30 bodyguards got a clean shot on me in the eye. RESPECT!!"
Commenting on the fracas, Mayweather said: "It's one thing to sell a fight, and people can say what they want, but one thing no one is going to do, is disrespect me."
The younger Paul, meanwhile, has cashed in on the chaos by selling hats with "Gotcha cap" - his taunt to Mayweather - printed on them.
He's also changed his username to reference the stunt he pulled and even got a tattoo coining the phrase.