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 ...

Offside is one of soccer’s most confusing rules, but the basic idea is simple once you know what referees are looking for.

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 ...

Understanding soccer's offside rule hinges on timing — it's about a player's position when the ball is passed, not received.

Folarin Balogun thought he had doubled the United States’ lead against Paraguay, but the goal was ruled out after an offside ...