In 1996, a British man bet £59 on nine horses in a single accumulator. All nine won. He received £550,823. It is one of the largest documented individual payouts in sports betting — but it is not the biggest on this list. Not even close.
The 10 biggest betting wins of all time
1. Billy Walters — $300 million over a 30-year career
Widely regarded as the most successful sports bettor in American history, Billy Walters turned gambling into a professional operation spanning three decades. He built networks of informants across the country, applied data analysis long before it was commonplace, and used anonymous agents placed across Las Vegas to place bets without attracting attention.
His estimated cumulative winnings exceed $300 million, according to former associates and investigations by the Wall Street Journal. He never reported a losing year. He was the subject of a CBS 60 Minutes profile on professional sports betting.
2. Darren Yates — £59 that became £550,823 (1996)
In August 1996, Darren Yates placed £59 on a 9-horse accumulator with Ladbrokes. The probability of all nine winning was astronomical. All nine won.
Ladbrokes paid out £550,823. Yates used the money to buy his first home. In absolute terms, it remains one of the largest single-bet payouts in British horse racing accumulator history.
3. The "Magnificent Seven" of Frankie Dettori — a bookmaker's nightmare (1996)
On 28 September 1996, jockey Frankie Dettori rode and won every one of the seven races at Ascot racecourse in England. An unprecedented event in the history of British racing.
Thousands of bettors had included Dettori in accumulators — a common practice when a high-profile jockey rides multiple races in a day. When he won all seven, bookmakers faced estimated losses of between £30 and £50 million. Ladbrokes described that Saturday as the most expensive day in their history up to that point.
4. James Adducci — $85,000 on Tiger Woods (2019)
In April 2019, James Adducci walked into a William Hill sportsbook in Las Vegas and placed $85,000 on Tiger Woods to win The Masters at Augusta, at odds of 14-1. It was his first sports bet ever.
Tiger Woods won — his first major in 11 years, a comeback considered impossible by virtually every expert. Adducci received $1.19 million. The story made front pages of US sports publications for weeks.
5. Nick Newlife — £100,000 on Djokovic, won it, donated everything (2013)
Nick Newlife, a retired man from Oxford, placed £100,000 on Novak Djokovic to win Wimbledon 2013 at odds of 3-1. Djokovic won. Newlife collected £300,000 in profit.
He donated the entire amount to Oxfam. When asked by reporters, he said he had more money than he needed and that Djokovic's victory was probable enough to risk £100,000. It is one of the rare documented cases where a winning bettor donated all proceeds to charity.
6. David Oancea "Vegas Dave" — ~$2.5 million on the Royals (2015)
Before the 2015 World Series, David Oancea — known in betting circles as "Vegas Dave" — spread $100,000 bets across multiple Las Vegas sportsbooks on the Kansas City Royals to win the series. The Royals were considered unlikely contenders.
The Royals won. Oancea's estimated total payout was approximately $2.5 million. The bets and winnings were real and publicly documented.
7. Leicester City bettors — 5,000-1 (2016)
Before the 2015-16 season, British bookmakers offered 5,000-1 on Leicester City to win the Premier League. One fan placed £20 and received £100,000. Another who had put £50 at the start of the season received £250,000. Dozens of cases were documented in the British press.
Bookmakers estimated combined losses of several million pounds from this single market. Leicester won the title by 10 points.
8. Bettors on Trump in the 2016 US election
In the week before the 2016 American election, odds on Donald Trump ranged from 3-1 to 5-1 at many European bookmakers. Betfair reported that one anonymous bettor won approximately $1 million from a large-volume bet placed before election night. Hundreds of smaller British bettors reported winnings between £10,000 and £100,000.
9. Mick Gibbs — 30p, 15 teams, £157,000 (2001)
In 1999, Mick Gibbs placed 30p on a 15-team European football accumulator — each team needing to win their specific competition that season. Two years later, when Aston Villa won the UEFA Intertoto Cup in 2001, completing the final leg, Ladbrokes paid out £157,000 for 30 pence. Gibbs said he had nearly forgotten the bet existed.
10. Fred Craggs — 50p that became £500,000 (2008)
Fred Craggs, a mechanic from Yorkshire, discovered on his birthday that a 50p accumulator he had placed that morning had come in on 8 consecutive horses. William Hill paid out £500,000. He told reporters he had chosen the horses "for fun" and couldn't quite believe it for days.
The pattern behind the wins
Most of these stories involve rare, verifiable events where someone bet in the right direction before everyone else. Some used analysis (Walters; Adducci studied Tiger's comeback). The consistent winners operated on the principle of value betting: finding situations where the true probability exceeded what the odds implied. Most also involved a substantial dose of luck.
The story that never appears on this list is of those who placed similar amounts, in similar directions, and did not win. They are the overwhelming majority.
Gamble responsibly
These stories are extraordinarily rare exceptions. Sports betting involves real risk of financial loss for the vast majority of participants. Never bet amounts you cannot afford to lose.
If gambling is affecting your life or the lives of those close to you, seek help: BeGambleAware: www.begambleaware.org | GamCare: www.gamcare.org.uk | US National Helpline: 1-800-522-4700