Oscar “La Migraña” Duarte (29-2-1, 23 KOs), known for his relentless pressure and knockout power, will go toe-to-toe with Chicago’s own Kenneth “Bossman” Sims Jr. (22-2-1, 8 KOs), a slick technician with everything to prove in front of a hometown crowd. The two junior welterweights will have nowhere to run during the twelve-round main event that takes place Saturday, August 2nd, live worldwide on DAZN from Credit Union 1 Arena in Chicago. Originally scheduled for November 2024 in Riyadh, Saudi Arabia, the bout was postponed due to Sims Jr.’s knee injury during training camp. Presented in association with Cancun Boxing, the event also marks Golden Boy’s return to the Windy City after more than a decade's absence.

“I feel very happy and motivated to be the main event on August 2nd against Sims Jr., an opponent I had previously scheduled to fight, but due to fate, the fight was postponed,” said Duarte. “I want to take this opportunity to thank Oscar de la Hoya, Eric Gómez, and the entire Golden Boy team for their trust. We are going all out, going for that win to get closer to a world championship.” 

“This fight is long overdue and I’m ready to put on a show and leave with the victory,” said Sims Jr. “I’m fully healthy now and ready to put on a stellar performance for my fans in Chicago. It’s a dream come true to headline in my hometown, the greatest city in the world.”

“There is nowhere to run and hide for Duarte and Sims in this fight that has been brewing over the past year,” said Chairman and CEO Oscar De La Hoya. “With all the animosity between the two, I can assure that fireworks will explode in this summer firecracker!” More information on tickets and undercard will be announced in the coming weeks. 

The first time Duarte stepped in a boxing ring was at 11 years old when his friends invited him to spar. Boxing seemed like Duarte’s life calling ever since, as he went on to claim five state championships, five regional championships, four national titles, and a bronze medal as an amateur. Duarte began his professional career in 2013, steadily building a reputation for his power, crisp combinations and ability to apply unwavering pressure on his opponents. Duarte lost to Ryan Garcia in December 2023. Although coming up short against the hard-hitting Garcia, Duarte focuses on growth and his willingness to challenge himself against the best fighters in the division to demonstrate his determination to reach the highest levels of boxing. Under the tutelage of trainer Robert Garcia, Duarte made an impressive comeback, being the first fighter to ever stop former champion Joseph “Jo Jo” Diaz in April 2024. We then saw him against former stablemate Batyr Akhmedov in an all-action battle in Riyadh, Saudi Arabia, where he secured a unanimous decision victory.

Most recently, Duarte returned to the ring to take on the hard-hitting Miguel Madueño, in an all-Mexican, crowd-pleasing brawl in February 2025. In that bout, Duarte became the first fighter to stop Madueño, securing a seventh-round knockout.

An amateur standout and former Team USA member, Sims' amateur career saw him become a nine-time national champion and make an appearance in the 2012 Olympic Trials where he lost a one-point decision to eventual Olympian and future pro champion Jose Ramirez. He later continued to win the 2013 U.S. National Championships to earn a spot on the USA Boxing National Team. Sims Jr. was soon traveling the world with his teammates, visiting locations such as Ukraine, Ireland, Chile and Puerto Rico, culminating with an appearance in the 2013 World Championships in Kazakhstan. Sims Jr. decided to go professional in March 2014 and quickly amassed a winning streak. With only two losses and a draw as blemishes on his record, he rebuilt himself to be one of the toughest super lightweights in the division. His breakout performance was an upset win against previously undefeated prospect Elvis Rodriguez on May 22, 2021. Since then, he has added six more victories to his resume.

The ‘Bossman’ made his mark once again on the Duarte-Madueño undercard at the Honda Center on Feb. 15, 2025, claiming a unanimous decision victory in an action-packed fight.