Rules of the Game: During a kick-off, the opponents of the team taking the kick-off must be at least 9.15 m (10 yds) from the ball until it is in play.
Rules of the Game: For FIFA matches, the ball should weigh not more than 450 g (16 oz) and not less than 410 g (14 oz) at the start of the match.
Rules of the Game: The ball is in play at all other times it rebounds from either the referee or an assistant referee when they are on the field of play.
Rules of the Game: In the event that the game ball should burst or fail somehow during the run of play, the referee will immediately stop the match until the game can be resumed by calling for a drop ball at the spot of the failure with a fresh ball.
D.C. United has won the MLS Cup four times, more than any other team.