How Ippei Mizuhara descended into a sports betting nightmare
-
Paula Lavigne, ESPN Investigative Reporter
In their complaint filed Thursday, federal investigators said they had conducted forensic reviews of the phone of Shohei Ohtani‘s former interpreter, Ippei Mizuhara, as well as devices belonging to “Bookmaker 1,” assumed to be Southern California bookie Mathew Bowyer, and “Bookmaker 2,” an associate of Bowyer’s.
Prosecutors accused Mizuhara of bank fraud and said he stole more than $16 million over several years from Ohtani. Before he was fired by the Los Angeles Dodgers on March 20, Mizuhara had interpreted for Ohtani since the superstar moved to the United States in 2018.
Texts among the parties, as laid out in the 37-page complaint, depict Mizuhara’s apparent descent into an uncontrolled sports betting addiction, and the bookie who kept extending his credit as long as Mizuhara covered his losses.
Getting started
Mizuhara has said he met Bowyer at a poker game in San Diego in 2021. According to the complaint, on or about Sept. 8, 2021, “Bookmaker 2” provides Mizuhara an account number, password and URL for an illegal betting website. About two weeks later, Mizuhara messages Bookmaker 2: “Ive just been messing around with soccer, theres games on 24/7 lol. I took UCLA but they lost outright!!!”
The same day, Mizuhara messages Bookmaker 2: “How does the withdrawing and paying work?” Bookmaker 2 responds later that day, “He pays and collects as the week ends Sunday night[.] Whatever you are up or down Sunday night you pay or receive[.] Last week you were down and he rolled it as hes ok with it[.] I say have a settle figure[.] Meaning pick a number you want to settle at either way[.]”
On Oct. 27, 2021, Bookmaker 2 messages Mizuhara: “[Bowyer] asked me to reach out to you . . . he sees you playing and wants to settle this by tomorrow[.] I can meet you or one his runners can.” Mizuhara responds, “I’m back in Anaheim now, is there any way to pay [Bowyer] via credit or debit card . . . I can wire the amount to his bank account. Do you know what bank he uses?”
Through the fall, text traffic indicates Mizuhara struggling to transfer funds to cover his debt because of bank limits or other issues. On or about Nov. 9, he tells Bookmaker 2: “tried almost every option possible and none of it is working. … this is super stressing.”
The next day, he tells Bookmaker 2 that he is “able to send 40k,” adding that it looks as if the method works “but I can only send 40k at a time.”
Losses mount
The federal complaint indicates Mizuhara’s losses mounted almost immediately. He repeatedly asks the bookies to “bump” his account, or increase his line of credit.
On Jan. 2, 2022, Mizuhara asks Bookmaker 2 if [Bowyer] could “reload my account? I lost it all.” Bookmaker 2 responds, “[Bowyer] bumped you 50k.” Thirteen days later, Mizuhara texts Bookmaker 2 again: “F— I lost it all lol . . . can you ask [Bowyer] if he can bump me 50k? That will be my last one for a while if I lose it.”
By Feb. 4, 2022, Mizuhara texts: “I made another transfer for 300k today since I lost the other 100k already.” Later that day, he confirms, “Wire went through!”
Over the next two years, according to the complaint, Mizuhara averaged 25 bets per day, ranging from $10 to $160,000 per bet, between December 2021 and this January — some 19,000 bets in all. His texts during this time show increasing desperation to catch up.
Some highlights of that time:
March 10, 2022: Mizuhara messages Bowyer asking him to reduce his credit from $300,000 to $100,000. “I’ll get too reckless with 300,” he says.
May 2022: Text messages from Mizuhara indicate he’s on a “bad run.” Despite Mizuhara owing Bowyer over $1 million, Bowyer continually increased Mizuhara’s betting limits, investigators said.
Nov. 14, 2022: Mizuhara texts Bowyer: “I’m terrible at this sport betting thing huh? Lol . . . Any chance u can bump me again?? As you know, you don’t have to worry about me not paying!!”
Dec. 9, 2022: Mizuhara texts Bowyer: “Can u bump me last 200? I swear on my mom this will be the last ask before I pay it off once I get back to the states. Sorry for keep on asking. . . .” Bowyer responds: “Np done bud. Merry Christmas.”
May 20, 2023: Bowyer texts Mizuhara: “I know you’ve been on a bad run. I don’t mind bumping u, I just want to verify that you can send at least 2M on June 1.”
June 22, 2023: Mizuhara texts Bowyer: “I got my ass kicked again lol . . . . Any chance I can get one last bump? This will be my last one for a while if I lose it. . . .” Bowyer responds: “Ok bud. I just want to be able to communicate with my partner so he knows expectations. If I can assure him that minimum 500 will be sent every week I can do the bump to whatever you want? It’s just imperative that the 500 is sent every week as you can imagine the figures are very high and just don’t want to not be able to deliver what I tell him[.] FYI I have already paid out of my pocket to him half of the balance that is on the account so whatever is lost every week I have to give him half of the balance that’s why I’m asking these direct important questions.”
June 24, 2023: Mizuhara texts Bowyer: “I have a problem lol. . . . Can I get one 13 last last last bump? This one is for real. … Last one for real[.]” Bowyer responds, “Done. I have the same problem. To be honest with you Ippie, as long as you can guarantee the 500 every Monday I’ll give you as much as you want because I know you’re good for it[.] again I just have to clean it up with my partner and that’s one reason why I was asking before.”
In the complaint, an investigator testified that wagers for Mizuhara’s account, “35966” as reflected on a bookie’s spreadsheet, reflect total winning bets of about $142 million, total losing bets of about $183 million, leaving a total negative balance of about $40.7 million.
Paybacks and veiled threats
According to the complaint, Mizuhara was attempting to pay back his debt from Ohtani’s account in a series of weekly $500,000 transactions, but after making some payments he stops and the tenor of texts with Bowyer shifts.
On June 20, 2023, he texts Bowyer: “It looks like I can only send 500 per week. … I put in a wire for 500 earlier today so it should be in your account by tomorrow. . . . does 500/week work for you?”
Federal authorities raid Bowyer’s house in October and seize cash, computers and phones, according to a search warrant obtained by ESPN. On or about Nov. 17, 2023, Bowyer texts Mizuhara: “Hey Ippie, it’s 2 o’clock on Friday. I don’t know why you’re not returning my calls. I’m here in Newport Beach and I see [Ohtani] walking his dog. I’m just gonna go up and talk to him and ask how I can get in touch with you since you’re not responding? Please call me back immediately.”
Two days later, Mizuhara texts Bowyer: “I’m gonna be honest, I ended up losing a lot of money on crypto the last couple years and I took a huge hit obviously with the sports too. . . . Just wanted to ask, is there any way we can settle on an amount? I’ve lost way too much on the site already . . . of course I know it’s my fault.”
On Dec. 15, Bowyer texts Mizuhara, stating “I know ur busy but u Need to show some respect. I put my neck out here. Call me by Tonight. I don’t care what time or how late it is.” Mizuhara responds the same day: “I’m so sorry bro . . . I really don’t mean to disrespect you at all I promise . . . it’s just been super super busy . . . and I’ve got other issues on the side going on too. everything has just been really really tough recently.”
This past Jan. 6, the complaint states, Bowyer texts Mizuhara: “you’re putting me in a position where this is going to get out of control. If I don’t hear from you by the end of the day today it’s gonna [sic] be out of my hands.” Mizuhara responds: “My bad man. . . . I just got back from Japan two days ago and I’m leaving tomorrow again . . . I’ll be back in mid January. To be honest with you, I’m really struggling right now and I need some time before I start to make payments.”
From January to March, Mizuhara spends about $325,000 of Ohtani’s money on approximately 1,000 baseball cards, and has them mailed to the Dodgers clubhouse under the alias “Jay Min,” the filing says. Mizuhara buys the memorabilia, which included cards for Yogi Berra, Juan Soto and Ohtani, with the intent to resell it, according to the affidavit.
On March 20, news breaks that at least $4.5 million was transmitted from Ohtani’s account to Bowyer’s operation. Mizuhara first tells ESPN that Ohtani paid his debts before changing his story hours later to say Ohtani had no knowledge of his gambling. Mizuhara asks Bowyer if he has seen the media reports. Bowyer responds, “Yes, but that’s all bulls—. Obviously you didn’t steal from him. I understand it’s a cover job I totally get it,” Mizuhara responds, “Technically I did steal from him. it’s all over for me.”
ESPN’s Tisha Thompson contributed to this report.
The 2025 MLB All-Star Home Run Derby is fast approaching — and the field is set.
Braves hometown hero Ronald Acuna Jr. became the first player to commit to the event, which will be held at Truist Park in Atlanta on July 14 (8 p.m. ET on ESPN). He was followed by MLB home run leader Cal Raleigh of the Seattle Mariners, James Wood of the Washington Nationals, Byron Buxton of the Minnesota Twins, Oneil Cruz of the Pittsburgh Pirates, Junior Caminero of the Tampa Bay Rays, Brent Rooker of the Athletics and Jazz Chisholm Jr. of the New York Yankees.
On Friday, however, Acuna was replaced by teammate Matt Olson.
With all the entrants announced, let’s break down their chances at taking home this year’s Derby prize.
Full All-Star Game coverage: How to watch, schedule, rosters, more
2025 home runs: 17 | Longest: 434 feet
Why he could win: Olson is a late replacement for Acuna as the home team’s representative at this year’s Derby. Apart from being the Braves’ first baseman, however, Olson also was born in Atlanta and grew up a Braves fan, giving him some extra motivation. The left-handed slugger led the majors in home runs in 2023 — his 54 round-trippers that season also set a franchise record — and he remains among the best in the game when it comes to exit velo and hard-hit rate.
Why he might not: The home-field advantage can also be a detriment if a player gets too hyped up in the first round. See Julio Rodriguez in Seattle in 2023, when he had a monster first round, with 41 home runs, but then tired out in the second round.
2025 home runs: 36 | Longest: 440 feet
Why he could win: It’s the season of Cal! The Mariners’ catcher is having one of the greatest slugging first halves in MLB history, as he’s been crushing mistakes all season . His easy raw power might be tailor-made for the Derby — he ranks in the 87th percentile in average exit velocity and delivers the ball, on average, at the optimal home run launch angle of 23 degrees. His calm demeanor might also be perfect for the contest as he won’t get too amped up.
Why he might not: He’s a catcher — and one who has carried a heavy workload, playing in all but one game this season. This contest is as much about stamina as anything, and whether Raleigh can carry his power through three rounds would be a concern. No catcher has ever won the Derby, with only Ivan Rodriguez back in 2005 even reaching the finals.
2025 home runs: 24 | Longest: 451 feet
Why he could win: He’s big, he’s strong, he’s young, he’s awesome, he might or might not be able to leap tall buildings in a single bound. This is the perfect opportunity for Wood to show his talent on the national stage, and he wouldn’t be the first young player to star in the Derby. He ranks in the 97th percentile in average exit velocity and 99th percentile in hard-hit rate, so he can still muscle the ball out in BP even if he slightly mishits it. His long arms might be viewed as a detriment, but remember the similarly tall Aaron Judge won in 2017.
Why he might not: His natural swing isn’t a pure uppercut — he has a pretty low average launch angle of just 6.2 degrees — so we’ll see how that plays in a rapid-fire session. In real games, his power is primarily to the opposite field, but in a Home Run Derby you can get more cheapies pulling the ball down the line.
2025 home runs: 20 | Longest: 479 feet
Why he could win: Buxton’s raw power remains as impressive as nearly any hitter in the game. He crushed a 479-foot home run earlier this season and has four others of at least 425 feet. Indeed, his “no doubter” percentage — home runs that would be out of all 30 parks based on distance — is 75%, the highest in the majors among players with more than a dozen home runs. His bat speed ranks in the 89th percentile. In other words, two tools that could translate to a BP lightning show.
Why he might not: Buxton is 31 and the Home Run Derby feels a little more like a younger man’s competition. Teoscar Hernandez did win last year at age 31, but before that, the last winner older than 29 was David Ortiz in 2010, and that was under much different rules than are used now.
2025 home runs: 16 | Longest: 463 feet
Why he could win: If you drew up a short list of players everyone wants to see in the Home Run Derby, Cruz would be near the top. He has the hardest-hit ball of the 2025 season, and the hardest ever tracked by Statcast, a 432-foot missile of a home run with an exit velocity of 122.9 mph. He also crushed a 463-foot home run in Anaheim that soared way beyond the trees in center field. With his elite bat speed — 100th percentile — Cruz has the ability to awe the crowd with a potentially all-time performance.
Why he might not: Like all first-time contestants, can he stay within himself and not get too caught up in the moment? He has a long swing, which will result in some huge blasts, but might not be the most efficient for a contest like this one, where the more swings a hitter can get in before the clock expires, the better.
2025 home runs: 23 | Longest: 425 feet
Why he could win: Although Caminero was one of the most hyped prospects entering 2024, everyone kind of forgot about him heading into this season since he didn’t immediately rip apart the majors as a rookie. In his first full season, however, he has showed off his big-time raw power — giving him a chance to become just the third player to reach 40 home runs in his age-21 season. He has perhaps the quickest bat in the majors, ranking in the 100th percentile in bat speed, and his top exit velocity ranks in the top 15. That could translate to a barrage of home runs.
Why he might not: In game action, Caminero does hit the ball on the ground quite often — in fact, he’s on pace to break Jim Rice’s record for double plays grounded into in a season. If he gets out of rhythm, that could lead to a lot of low line drives during the Derby instead of fly balls that clear the fences.
2025 home runs: 19 | Longest: 440 feet
Why he could win: The Athletics slugger has been one of the top power hitters in the majors for three seasons now and is on his way to a third straight 30-homer season. Rooker has plus bat speed and raw power, but his biggest strength is an optimal average launch angle (19 degrees in 2024, 15 degrees this season) that translates to home runs in game action. That natural swing could be picture perfect for the Home Run Derby. He also wasn’t shy about saying he wanted to participate — and maybe that bodes well for his chances.
Why he might not: Rooker might not have quite the same raw power as some of the other competitors, as he has just one home run longer than 425 feet in 2025. But that’s a little nitpicky, as 11 of his home runs have still gone 400-plus feet. He competed in the college home run derby in Omaha while at Mississippi State in 2016 and finished fourth.
2025 home runs: 17 | Longest: 442 feet
Why he could win: Chisholm might not be the most obvious name to participate, given his career high of 24 home runs, but he has belted 17 already in 2025 in his first 61 games after missing some time with an injury. He ranks among the MLB leaders in a couple of home run-related categories, ranking in the 96th percentile in expected slugging percentage and 98th percentile in barrel rate. His raw power might not match that of the other participants, but he’s a dead-pull hitter who has increased his launch angle this season, which might translate well to the Derby, even if he won’t be the guy hitting the longest home runs.
Why he might not: Most of the guys who have won this have been big, powerful sluggers. Chisholm is listed at 5-foot-11, 184 pounds, and you have to go back to Miguel Tejada in 2004 to find the last player under 6 foot to win.
-
Sports3 years ago‘Storybook stuff’: Inside the night Bryce Harper sent the Phillies to the World Series
-
Sports1 year agoStory injured on diving stop, exits Red Sox game
-
Sports2 years agoGame 1 of WS least-watched in recorded history
-
Sports2 years agoMLB Rank 2023: Ranking baseball’s top 100 players
-
Sports4 years ago
Team Europe easily wins 4th straight Laver Cup
-
Sports2 years agoButton battles heat exhaustion in NASCAR debut
-
Environment2 years agoJapan and South Korea have a lot at stake in a free and open South China Sea
-
Environment2 years agoGame-changing Lectric XPedition launched as affordable electric cargo bike