Leicester City 2015–16 — The 5,000–1 Champions

Leicester City's 2015–16 title win, at pre-season odds of 5,000–1, is statistically the greatest sporting upset in football history—outperforming #8's rivals by any measure of improbability. Jamie Vardy scored 24 goals and set a record with 11 consecutive Premier League games scoring, while Riyad Mahrez's 17 goals earned PFA Player of the Year honors. N'Golo Kanté's 151 tackles anchored a side that won 23 of 38 games, finishing 10 points clear of second place. Their 81-point total is 19 points fewer than #5 Manchester City 2017–18, but the context of their survival from relegation the prior season makes this achievement unmatched.