For all you sport enthusiasts out there, here's a page collecting PODs concerning the history of various sports - whether about their origins, evolution, organized and unorganized versions, you should all be able to find it here. All POD entries are sorted as chronologically as possible.
Sports What Ifs, courtesy of Dave
Alternate history sports discussion
Cultural WI: Eternal Olympic Games
Byzantines restart the Olympic Games
Challenge: American Sports in a Confederate Secession World
Confederate States at the Olympic Games and FIFA World Cup
Alternate Winter Olympic host cities, present and future (from 1924 onwards)
Alternate Olympic Games Venues, 1948-2018
Alternate and More Awesome Olympic/Paralympic Sports
No Olympic boycotts in 1976, 1980 and 1984
Challenge: Southern hemisphere Winter Olympics
Will women ever play professional sports alongside men ?
What city will be the first African Olympic host ?
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Byzantines restart the Olympic Games
WI: Richard the Lionheart popularizes bullfights in England
Jousting as a modern spectator sport ?
Challenge: Martial Arts in the West
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Alternate Football (Soccer) Matches
Football (Soccer) World Cup in a world with many German countries
WI: United British Isles football team
Challenge: Have The United States be a football nation (with a POD after 1900) 1
Challenge: Have The United States be a football nation (with a POD after 1900) 2
Soccer/Football WI: Vatican soccer team in UEFA Champions' League ?
England qualifying in the 1978 World Cup ?
Ferguson fails at Manchester United
WI: Cameroon beats England in 1990
WI Paul Gascoigne had joined Manchester United rather than Spurs ?
Soccer WI: Italy goals golden in 1998
DBWI: If South Korea didn't win the World cup finals in 2002
WI: Cameroon beats Brazil 7-1 in the 2014 World Cup
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Challenge: Unified, hybridised "North American Football"
Challenge: Rugby the Dominant Sport in the United States
Challenge: Make American Football Dominant Sport in Europe
Challenge: American Football and Rugby more popular than Football
Challenge: Break the Old Firm's (Glasgow Celtic and Glasgow Rangers) dominance in Scottish football
WI Patriots win the 2008 Super Bowl
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Challenge: Make Baseball popular in Europe
Baseball remains the most popular team sport in America (with a POD in 1960)
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Challenge: Have basketball dominate the sports world
WI: An earlier ABA-NBA merger ?
Why hasn't handball caught on in the US ?
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Challenge: Motor racing at the Olympics (1)
Challenge: Motor racing at the Olympics (2)
List of Alternate F1 World Champions (1)
List of Alternate F1 World Champions (2)
World Touring Car Champion from the late-60s and early-70s
Motorsport WI: Group B Lives On
Formula 1 Turbo Era never ends
Plausibility check: Sports aviation revival after the Second World War
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Sports Timelines and Scenarios
Points of Divergence : Popular Culture
Points of Divergence : Society and Societal Norms