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

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 bane of some fans’ existence. Offside is often ...

The ball goes into the net, the crowd cheers, but then the assistant referee's flag goes up. The celebrations end. What happened? The play was offside. Offside is one of soccer's most important regulations, keeping players from cherry-picking or ...

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