Rules of the Game: During penalty kicks to determine the winner of a match, all players, except the player taking the kick and the two goalkeepers, must remain within the center circle.
Rules of the Game: During a kick-off, the kicker may not touch the ball a second time until it has touched another player.
Goalkeeper is the only position to be explicitly part of the rules of the game since they were codified in the 19th century.
Soccer has its roots in ancient games like Cuju, which was popular in China around 400 BC.
The most prolific goal-scorer in the North American Soccer League was Italian Giorgio Chinaglia of the New York Cosmos: 242 goals in 254 games.