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

Even though it's fairly straightforward, soccer's offside rule can be confusing for casual fans. And even controversial at ...

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.

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 ...

As the World Cup approaches, one of soccer’s most elusive phrases will pop up again and again on televisions across the country. You’ve heard it, you may claim to understand it, but what exactly is ...