Floyd Mayweather Jr., boxing’s undefeated champion inside the ring and one of its richest figures outside it, has filed a sweeping lawsuit against Showtime Networks, alleging the broadcaster helped divert hundreds of millions of dollars in fight earnings to his former manager.

The complaint, lodged Tuesday in California state court, accuses Showtime of playing a role in a yearslong scheme of “financial manipulation and self-dealing” orchestrated by ex-manager Al Haymon. Mayweather claims vast sums from his blockbuster bouts were siphoned into accounts he did not control.

He is seeking at least $340 million on claims that include breach of fiduciary duty and fraud.

The Richest Fighter in History

With career earnings estimated at roughly $1.2 billion, Mayweather stands as the highest-paid boxer of all time. He secured guaranteed purses of $100 million for his megafights against Conor McGregor and Manny Pacquiao — figures that exclude his share of the immense pay-per-view profits those record-setting events generated.

Known for flaunting his wealth, Mayweather has frequently displayed stacks of cash in public appearances and social media posts, cultivating an image of financial invincibility.

But in the lawsuit, he portrays himself not as a mogul in control — but as an athlete kept in the dark.

From HBO to Showtime

In 2013, Mayweather left HBO and signed an exclusive multi-fight agreement with Showtime, a deal described at the time as the most lucrative in boxing history. The Pacquiao and McGregor bouts were broadcast under that contract.

Instead of sending fight proceeds directly to him, Mayweather alleges Showtime wired his share to an account managed by his tax lawyer. He contends the network bears responsibility for what followed — the alleged misappropriation of funds by Haymon.

When a new management team sought detailed financial breakdowns in 2024 for certain fights, Showtime declined to provide them, according to the complaint. The network later invoked a statute of limitations defense, arguing that claims tied to 2015 bouts are time-barred.

The suit also alleges Haymon told Mayweather that certain records had been “lost due to a flood” at a storage facility.

A spokesperson for Paramount, Showtime’s parent company, rejected the accusations.

“These baseless claims lack legal or factual merit,” the spokesperson said in a statement. “We strongly reject them and will respond accordingly through the court process.”

A Long-Running Managerial Relationship

Under a 2005 oral agreement, Haymon agreed to serve as Mayweather’s manager for a 10% fee. Although that arrangement expired a year later, Haymon allegedly continued in the role for 15 more years, overseeing negotiations for fight contracts, television deals, sponsorships and investments.

Haymon is not named as a defendant in the lawsuit.

Mayweather alleges that banking records reveal substantial transfers to companies controlled by Haymon, labeled as “repayment” or “loan payoff.” Tens of millions of dollars were allegedly routed to Alan Haymon Development shortly after major fights.

The complaint also cites numerous individual transactions, including payments as large as $15 million on dates unrelated to any fight, often marked simply as “expenses.”

Alleged Document Alterations and Discrepancies

To conceal the alleged diversion of funds, Mayweather claims Haymon selectively shared financial documents, preventing him from learning the full scope of his fight revenues. In one instance, the manager allegedly altered the date on a contract to misrepresent when it had been signed.

The lawsuit also points to discrepancies tied to the Pacquiao fight, alleging inflated expense reimbursements and a $20 million reimbursement connected to the 2015 Andre Berto bout. Mayweather contends that funds from the Pacquiao event were used as a kind of slush fund to cover unrelated payouts, including the Berto reimbursement.

A Legal Fight Beyond the Ring

Now, as Floyd Mayweather Jr sues Showtime, the spectacle shifts from bright arena lights to courtroom scrutiny. The fighter who once mastered opponents with precision counters is mounting a legal offensive that challenges the financial mechanics behind some of boxing’s most lucrative nights.

Whether the case delivers a knockout verdict or ends in a negotiated settlement remains to be seen. But the allegations — of hidden accounts, missing records and multimillion-dollar transfers — ensure that this battle, unlike his bouts in the ring, may stretch well beyond 12 rounds.