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 ...

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

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 ...

When it comes to soccer, the term "offside" is infamously confusing. The rule has to do with offensive players' positions ...

This article may have Spanish-language video from our Telemundo sister station. Get the latest World Cup news in Spanish from Telemundo. NBC Universal, Inc. World Cup soccer is back again, which means ...