The ex-interpreter had exploited his personal and professional relationship with Ohtani to plunder millions from the two-way player’s account for years, at times impersonating Ohtani to bankers. Mizuhara signed a plea agreement that detailed the allegations on 5 May, and prosecutors announced it several days later.

Mizuhara’s attorney declined to comment outside the courthouse. Mizuhara spoke briefly in court acknowledging his guilt. “I worked for victim A and had access to his bank account and had fallen into major gambling debt,” he told the court. “I went ahead and wired money … with his bank account.”

Tuesday’s court hearing lasted approximately 45 minutes.

Mizuhara’s winning bets totaled over $142m, which he deposited in his own bank account and not Ohtani’s. But his losing bets were around $183m, a net loss of nearly $41m. He did not wager on baseball.

Mizuhara pleaded guilty to one count of bank fraud and one count of subscribing to a false tax return. The bank fraud charge carries a maximum of 30 years in federal prison, and the false tax return charge carries a sentence of up to three years in federal prison. The sentencing hearing is scheduled for 25 October.

He also is required to pay Ohtani restitution that could total nearly $17m, as well as more than $1m to the IRS. Those amounts, however, could change prior to sentencing.

Mizuhara’s plea deal was negotiated with prosecutors before he was even arraigned in federal court in Los Angeles in mid-May. He was initially charged with one count of bank fraud.

There was no evidence Ohtani was involved in or aware of Mizuhara’s gambling, and the player cooperated with investigators, authorities said.

The Los Angeles Times and ESPN broke the news of the prosecution in late March, prompting the Dodgers to fire the interpreter and MLB to open its own investigation.

MLB rules prohibit players and team employees from wagering on baseball, even legally. MLB also bans betting on other sports with illegal or offshore bookmakers.

Ohtani has sought to focus on the field as the case winds through the courts. Hours after his ex-interpreter first appeared in court in April, he hit his 175th home run in MLB, tying Hideki Matsui for the most by a Japan-𝐛𝐨𝐫𝐧 player, during the Dodgers’ 8-7 loss to the San Diego Padres in 11 innings.

Mizuhara’s hearing came hours after MLB banned San Diego Padres infielder Tucupita Marcano from baseball for life in the wake of another gambling scandal. MLB said Marcano placed 387 baseball bets totaling more than $150,000 in October 2022 and from last July through November with a legal sportsbook. He became the first active player in a century banned for life because of gambling. Four others were suspended Tuesday.