Image Mayweather, 44, said after the fight that he felt his age. Colina stepped in on short notice for Jean Pascal, who was scratched after a positive drug test.

In a light-heavyweight bout, Badou Jack defeated Dervin Colina after the referee stopped the fight in the fourth round. In a middleweight bout, Luis Arias defeated Jarrett Hurd in an upset via split decision. The two official fights were exciting, too. Just like with the Mayweather-Paul bout, there were no judges and thus no winner. Johnson performed well, but suffered a knockdown in the fourth round. He fought in an exhibition against mixed martial artist and bare-knuckle fighter Brian Maxwell. The exhibition capped a night with three other televised bouts, including one that featured Johnson, 43, a six-time Pro Bowl receiver who played 11 N.F.L. No winner was announced because there were no judges in the special event. Still, Mayweather landed shots and stalked Paul down without exerting much energy. But Paul constantly latched his frame onto Mayweather throughout the eight rounds of fighting. The experience gap led many to believe that Mayweather would knock Paul out. But Paul, who amassed his fame through social media, had lost the only professional fight he participated in. Mayweather, 44, entered the ring against a physically larger man - Paul, 26, weighed in 34½ pounds heavier and stood 6 inches taller. In the lead-up, both Mayweather and Paul spoke of how they wanted to entertain those that watched.

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