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Five years ago, if I mentioned I bet on baseball at a pub, I would get blank stares. Today I get follow-up questions — which team, what market, did I catch the London Series? The shift in awareness around MLB in Britain has been rapid, measurable and fascinating to watch from the inside. What was once a niche pursuit for American expats and stat-obsessed contrarians has become a legitimate part of the UK sports betting landscape, and the data from both the Gambling Commission and MLB itself confirms the trend.
The UK sports betting market generated two point four eight billion pounds in gross gaming yield in a recent financial year, making it the country’s leading gambling category with 47% of all gamblers participating. Within that market, American sports — NFL, NBA, and now MLB — are carving out a growing share that the industry can no longer dismiss as marginal. Andrew Rhodes, Chief Executive of the Gambling Commission, told the ICE World Regulatory Briefing in January 2025 that operators are reporting “a widening out of the sports offering,” with sports beyond traditional horseracing and football — including cricket, basketball, NFL and other US-based sports — growing in use.
This article traces that growth with data, examines the London Series effect, and looks at what operators and regulators are saying about the trend.
The UK Sports Betting Landscape in Numbers
Before we talk about baseball’s place in the ecosystem, the scale of that ecosystem deserves a moment. Online sports betting accounts for more than 56% of all online gambling revenue in the United Kingdom, making it the single largest segment by market share. Around 290 million online bets on real events are placed every month in the UK — more than any other gambling product except the National Lottery.
Participation in gambling has remained stable at 48% of the adult population, with 39% participating online. Rhodes noted at the BGC Annual General Meeting in February 2025 that when excluding lottery and charity lotteries, the 25-to-34 age group dominates participation. This demographic detail matters for baseball: the same generation that streams content globally, watches NFL on Sky, and follows the NBA through social media is the generation most likely to discover MLB through international broadcasts and London Series marketing.
Football still dominates UK betting, generating over one point one billion pounds in GGY. But the “other sports” category — where baseball sits alongside American football, basketball and emerging markets — is the fastest-growing segment proportionally. The exact breakdown for MLB alone is not published separately by the Gambling Commission, but the directional trend is clear from operator commentary and the expansion of baseball betting menus at UK bookmakers over the last three years.
How American Sports Gained Ground in UK Betting Markets
The growth of US sports betting in Britain did not happen by accident. It was driven by three converging forces: the expansion of live streaming, the scheduling of regular-season games on British soil, and the cultural normalisation of American sports content through social media.
NFL paved the way. The International Series at Wembley and Tottenham Hotspur Stadium demonstrated that British audiences would show up for American sports and — crucially — bet on them. Bookmakers invested in their American sports trading desks, built out market depth and trained staff on the idiosyncrasies of gridiron, basketball and eventually baseball. By the time MLB arrived at London Stadium in 2023, the infrastructure was already in place.
Rhodes described this trajectory explicitly when he noted that operator discussions reveal US-based sports as a growth area, alongside cricket and basketball. The expansion is not hypothetical — it is reflected in real product decisions by UKGC-licensed operators who are allocating resources to American sports because customer demand justifies it.
The demographic alignment helps. The 25-to-34 cohort that drives online betting growth is the same cohort that consumes US culture most voraciously. They follow MLB highlights on social media, stream games through MLB.TV, and arrive at betting markets with more knowledge of American sports than any previous British generation. The pathway from casual viewer to informed bettor is shorter and smoother than it has ever been.
The London Series: Measurable Impact on UK Baseball Interest
The London Series is not just a sporting event — it is a marketing exercise with quantifiable results. When the Cardinals met the Cubs at London Stadium in 2023, approximately 71% of the 55,000 attendees were UK citizens. This was not an American road show playing to expats; it was a British crowd discovering baseball live for the first time.
The downstream metrics were striking. MLB merchandise sales in the UK rose 43% following the series. UK-based MLB social media channels recorded a 133% increase in followers. Youth engagement spiked: around 4,500 young Londoners participated in baseball and softball through the First Pitch programme tied to the 2024 London Series. These are not vanity metrics — they represent a genuine widening of the MLB audience in Britain, and a wider audience means a wider betting audience.
MLB attendance globally hit a seven-year high in 2024 at over 71 million, with international viewership up 18% driven by games in Korea, Mexico and London. MLB.TV set a record of 14.5 billion streaming minutes in the same year, establishing itself as the primary channel for international viewers. For UK bettors, this streaming access is the missing piece that makes regular MLB betting viable — you can follow the games, build familiarity with teams and players, and make informed wagers rather than betting blind on a sport you never actually watch.
What Operators See and What It Means Going Forward
The operator side of this story is harder to quantify precisely because bookmakers do not publish sport-by-sport revenue breakdowns. But the signals are consistent. Major UK-licensed operators have expanded their MLB market offerings over the last three years, adding player props, first five innings markets and enhanced futures menus that did not exist for baseball in 2021. This investment only happens when customer demand justifies it.
The timing of promotional activity tells the same story. Around the London Series and MLB Opening Day, UK bookmakers now run baseball-specific promotions — enhanced odds, free bet offers, accumulator boosts on MLB games — that were previously reserved for football and horse racing. Marketing spend follows audience growth, and the fact that operators are spending on MLB acquisition suggests they see the sport as a viable long-term revenue stream rather than a one-week novelty.
The regulatory environment also shapes the trajectory. The 2025 UKGC reforms — affordability checks, the statutory levy, deposit limit prompts — apply across all sports, which means the cost of operating in the UK market is rising. In that context, expanding into growing sports like MLB helps operators diversify revenue and reduce dependence on football, which carries heavy competition and tight margins. Baseball’s long season, daily schedule and expanding UK audience make it an attractive complement to the traditional British sports calendar.
For a practical guide on how to enter this growing market, the main MLB betting guide covers bookmaker selection, odds formats and strategy from a UK perspective.