Floyd Mayweather's legal troubles continue to pile up, with a new lawsuit alleging the boxing icon breached a multi-million-dollar promotional agreement tied to his planned fights with Mike Tyson and Manny Pacquiao.
According to a complaint obtained by The Ring, CSI Sports Events filed suit Thursday in New York, claiming it paid Floyd Mayweather millions in advances in exchange for exclusive rights to promote two major events: an exhibition against Tyson and a professional rematch with Pacquiao. The company is seeking an injunction to halt Mayweather's June 27 exhibition against Greek kickboxer Mike Zambidis in Athens and wants to recover $4.65 million it says it advanced to the undefeated former champion.
The lawsuit claims CSI initially paid Mayweather $4.5 million and later sent another $150,000 to cover pre-fight medical expenses related to the Tyson exhibition. But according to the complaint, Mayweather announced the fight with Zambidis the day after receiving the second payment, allegedly violating terms prohibiting him from competing before fulfilling his obligations to Tyson.
The Tyson exhibition was originally targeted for spring 2026 and carried a reported purse of $14 million for Mayweather, with $2 million already paid up front. Although plans for an April event in the Democratic Republic of Congo were ultimately delayed after Tyson suffered a hand injury, CSI claims Tyson was willing to reschedule within six months and that Mayweather was not free to take another fight unless Tyson remained unavailable beyond November 30.
The lawsuit also sheds new light on the increasingly complicated Pacquiao rematch. CSI says Mayweather was guaranteed $35 million plus 20 percent of pay-per-view revenue, or $50 million if the event was not sold on PPV. The company claims it paid him a $2.5 million advance before he later entered into an agreement with production company EverWonder for a Netflix-backed fight. According to the complaint, the deal included another $2.75 million advance and a potential payout exceeding $28 million.
The filing marks yet another legal battle involving Floyd Mayweather during an extraordinarily turbulent year. Earlier this week, ESPN reported that the 50-0 boxing legend is facing felony charges in Nevada stemming from allegations that he knowingly wrote a bad $200,000 check to purchase an Audemars Piguet watch from a Las Vegas luxury retailer.
His attorney, Adrian Lobo, pushed back on those allegations, saying Mayweather "had absolutely no intent to defraud" and arguing that the dispute belongs in civil court.
Beyond the criminal case, Mayweather has been linked to a reported $7.3 million IRS tax lien, lawsuits involving unpaid rent, jewelry purchases, private jet services, and more than $1 million in child support obligations.
At the same time, he has aggressively pursued litigation of his own, including a $340 million lawsuit against Showtime and a $175 million fraud case against former adviser Jona Rechnitz.
Meanwhile, the dispute surrounding Manny Pacquiao remains unresolved. Pacquiao's side has maintained that signed agreements exist for a professional fight and has repeatedly stated that both fighters accepted advances.
Despite the mounting legal issues, Mayweather has publicly insisted that the headlines don't bother him. Responding to the growing scrutiny on Instagram this week, he wrote, "Good press, bad press, facts or fiction… pick your poison."
