Zuffa Boxing go back to a fight that ended violently the first time. Edwin De Los Santos and Jose “Rayo” Valenzuela are set for a lightweight rematch in the main event of Zuffa Boxing 08 on August 15 at The Chelsea in The Cosmopolitan of Las Vegas, with the card streaming on Paramount+.
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The first fight between De Los Santos and Valenzuela in 2022 lasted just three rounds, but it changed the direction of both careers. De Los Santos dropped Valenzuela twice before finishing him in the third round in one of the bigger upset knockouts of that year. Valenzuela later rebuilt his position with wins that pushed him back into the lightweight picture, while De Los Santos remained tied to dangerous fight talk due to his power and pressing style.
The rematch lands at an interesting point for both fighters. Valenzuela has tried to prove in recent years that the first loss was more about inexperience and defensive mistakes than a ceiling issue. De Los Santos, meanwhile, returns to the exact opponent he’s already stopped, creating pressure of a different kind. If he wins again, especially by knockout, the first result seems permanent rather than accidental.
Zuffa seems to be building the card around action fights rather than titles. The co-feature will see Omar Trinidad take on former world champion Jerwin Ancajas in a 12-round featherweight bout. Brandun Lee will also return against Cain Sandoval in a 10-round welterweight bout.
The event will take place in Las Vegas rather than at a larger arena, which fits with the direction Zuffa Boxing has taken with its presentation thus far. The company focused heavily on compact cards built around recognizable names and aggressive matchups instead of stacking championship belts across the lineup.
De Los Santos, 26, has fought just three times since his 2022 knockout victory over Valenzuela, but his power still stands out as a real problem at lightweight. In his last outing on December 13, 2025, he knocked out Eliot Chavez in the first round with the kind of punches that can change a fight instantly. Chavez is nowhere near the level of Valenzuela, but the punching power that De Los Santos showed in that fight is the same thing that makes this rematch dangerous for Rayo going into August 15th.
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Last updated on 2026/05/08 at 11:31
