The playoff tournament is organized by the league in a format similar to other North American professional sports leagues. At the conclusion of the regular season, the top four clubs in the standings earn a berth to the tournament. The first NWSL Championship was played on September 1, 2013. As of 2018, the record for the most championships is shared by the Portland Thorns FC and former club FC Kansas City, with two titles each. The record for the most championships lost is held by Reign FC, who have lost the title game two times since the inaugural season in 2013.  , four clubs have been crowned NWSL Champions: Portland Thorns FC (2), FC Kansas City (2), North Carolina Courage (2), and Western New York Flash (1). Four clubs have claimed the NWSL Shield: North Carolina Courage (3), OL Reign (2), Portland Thorns FC (1), and Western New York Flash (1). In 2018, the North Carolina Courage became the first team to win both the NWSL Shield and the NWSL Championship in the same season. During the 2013–2016 seasons, the majority of league games were available for viewing via YouTube or via individual team's websites. Of the eight teams in the league during the inaugural season, the Boston Breakers were the only team that charged a fee for access to their broadcasts. On April 18, 2013, NWSL signed a one-year agreement with Fox Sports 2 to televise six regular season games, the semifinal, and championship games. On May 28, 2014, the NWSL signed a one-year agreement with ESPN to televise nine games of the 2014 NWSL season. The matches included three regular season and three playoff matches on ESPN2, as well as 3 regular season games live-streamed on ESPN3. On June 30, 2015, the NWSL announced a one-year agreement with Fox Sports once more to cover ten matches. Three regular season and three playoff matches were televised on FS1, and four live-streamed on Fox Sports Go. The agreement was extended into 2016 under another one-year contract, covering three regular season matches and the three playoff matches, once again on FS1. On February 2, 2017, the NWSL announced a three-year agreement with A&E Networks, in which the Lifetime network broadcast 22 regular-season matches as the "NWSL Game of the Week" at 4 p.m. Eastern time on Saturday afternoons, as well as three post-season matches. This marked the first time that the NWSL had a weekly broadcast window throughout the entire season.