Yes, when Leicester City won the Premier League in the 2015-2016 season, it was one of the biggest surprises in the history of sports betting. Bookmakers had offered incredibly long odds on Leicester winning the title at the start of the season, reflecting the general consensus that they were unlikely to win. Many people did place bets on Leicester to win the league, although the number of people who bet substantial amounts at those odds was relatively small.

The odds were so long that some reports suggested that a few individuals who placed significant bets on Leicester to win could have won millions of pounds from their investments. For instance, one famous story was about a punter who placed a £10 bet at 5,000-1 odds, which returned £50,000 when Leicester City won the title.

The unexpected success of Leicester City that season is often cited as a perfect example of why sports betting can be so unpredictable and why it’s important to never underestimate the underdog.