[1] At its peak, the USCL comprised twenty teams, whose members included some of the highest-rated chess players in the United States.
[2] Participants in the last season included Wesley So, Alexander Onischuk, Alex Lenderman, Anton Kovalyov, Varuzhan Akobian, Daniel Naroditsky, Julio Becerra, Joel Benjamin, and many other grandmasters.
The 2005 season began on August 30 and ended on November 23 with the Baltimore Kingfishers crushing the Miami Sharks to win the inaugural USCL title.
The 2006 season began on August 30 and ended on November 29 as the San Francisco Mechanics defeated the New York Knights in the blitz tiebreaker to win the championship.
*Won blitz tiebreaker The 2008 season began on August 25 and ended on December 6 with a rematch of last years USCL Championship game.
The rules were also changed to eliminate alternates, favoring instead another permanent roster spot, increasing the size to nine, or ten if at least one woman is on the team.
*Advanced due to draw odds The 2012 season began on September 4 and ended on December 1 which featured the Philadelphia Inventors against the Seattle Sluggers; both making their first appearance in the title match.
Despite making back-to-back playoff appearance and reaching the championship game the previous season, the Chicago Blaze did not play in 2012.
*Advanced due to draw odds The 2013 season began on August 27 and ended on November 20 with the Miami Sharks getting their first title over the New York Knights in a rematch from 2009 championship game.
*Advanced due to draw odds The 2014 season began on August 26 and ended on December 3 with the St. Louis Arch Bishops defeating the Dallas Destiny in a blitz tiebreaker.
*Won blitz tiebreaker The 2015 season began on August 25 and ended on December 1 with the Manhattan Applesauce defeating the St. Louis Arch Bishops to claim their first title.
[41] *Advanced due to draw odds Teams consist of rosters of ten players, and each week the manager selects a lineup of four, depending on rating, form, and availability.
At the end of the regular season, the four teams in each division with the highest match point totals qualify for the playoffs, which are conducted in a knockout format.