The MLS Cup is the post-season championship of Major League Soccer (MLS), a professional club soccer league in the United States. The 2005 season was the tenth in league history, and was contested by twelve teams divided into two conferences. Each club played 32 matches during the regular season from April 2 to October 16, facing each team twice and in-conference teams two additional times. The playoffs, running from October 21 to November 13, were contested by the top four clubs in each conference. It was organized into three rounds: a home-and-away series in the Conference Semifinals, a single-match Conference Final, and the MLS Cup final.
