This beautiful game would be very ugly if offside didn't exist. At the World Cup, you'll see it often.

The law governing its modern application has 45 clauses and runs to more than 1,000 words. A former Premier League referee ...

The Sporting News breaks down the offside rule, how it is enforced and why it's a part of the game.

Learn World Cup football rules fast with simple explanations of offside, stoppage time, free kicks vs penalties, tiebreakers, ...

World Cup soccer is back again, which means one of the most controversial calls in sports is returning, as well. The offside rule has caused some of the most frustrating moments ever in soccer and is ...

The Women’s World Cup is back again, which means one of the most controversial calls in sports has also returned. The offside rule has caused some of the most frustrating moments ever in soccer and is ...

The flag is up! We explain what that means and why one of soccer's most important rules is also one of the toughest to see live.

Premier League clubs have unanimously voted in favour of introducing semi-automated offside technology from next season. Why have they done this? What exactly IS semi-automated offside technology? We ...

SEATTLE — For nearly two minutes Friday afternoon, confusion spread across the stadium. Fans inside Seattle’s Lumen Field — ...