USL Championship

The USL Championship (USLC) is a men's professional soccer league in the second tier of the United States league system. It is organized by the United Soccer League (USL) as its premier league for men above USL League One. Operating under a franchise model, 24 teams divided between the league's Eastern and Western conferences compete in an annual round-robin regular season, lasting from spring to fall. At the end of the season, the top team overall wins the Players' Shield, while the top eight teams in each conference advance to a playoff tournament culminating in the USL Championship final, which determines the champion. The league's teams also simultaneously compete in the U.S. Open Cup and USL Cup.

Playing its first season in 2011 as USL Pro, and later the USL, the league formed from the merger of the USL's preceding two pro leagues, after a number of clubs broke away to found the North American Soccer League. It was initially sanctioned by U.S. Soccer as a third-tier league, but was later promoted to the second tier in 2017. Reserve teams of Major League Soccer (MLS) franchises also competed in the league from 2014 to the advent of MLS Next Pro in 2022. The Championship adopted its current name following the re-establishment of a second pro league in 2019. A third pro league, tentatively named USL Division One, is currently being planned to supersede the Championship as the USL's premier league.

As of the 2024 season, Colorado Springs Switchbacks FC are the current champions, while Louisville City FC and Orlando City SC have won the most championships each (2). The current Players' Shield holders are Louisville City FC, while Orlando City SC has won the most Players' Shields (3). Three former USL Championship teams – Orlando City SC, FC Cincinnati, and Nashville SC – are now MLS franchises.

Though leaked by the Dayton Dutch Lions weeks prior, the USL announced in a September 2010 press release the merger of its First and Second Division into the USL Pro, a new league with D3 status granted by U.S. Soccer. The Lions, then a Premier Development League (PDL) team, joined the new competition alongside the five remaining Second Division clubs: the Charleston Battery, Charlotte Eagles, Harrisburg City Islanders, Pittsburgh Riverhounds, and Richmond Kickers; and a reactivated Wilmington Hammerheads, who last played in the Second Division. The Austin Aztex, the lone surviving First Division club, joined as Orlando City SC, after relocating to Orlando, Florida. The Rochester Rhinos also joined, aborting their plan to defect from the USL to the NASL.

USL President Tim Holt initially hoped to launch USL Pro with 14–20 teams across four conferences. Two of these conferences were to be a "Caribbean" and "Western" division – the league added the Puerto Rico Soccer League's (PRSL) Puerto Rico United, River Plate Puerto Rico, and Sevilla FC Puerto Rico; and the Antigua Barracuda and Los Angeles Blues; as expansion teams to serve as "building blocks" for these divisions. For the inaugural 2011 season, these five clubs were grouped in a "International" division, while the nine existing USL clubs and another expansion team, F.C. New York, were divided into the "American" and "National" divisions.

The league's first match took place on April 2, 2011, at City Stadium in Richmond, Virginia, where the Kickers defeated Orlando City and Stanley Nyazamba scored the league's first goal. The season initially structured the American and National divisions as a de facto single division, with their teams only occasionally playing International opponents. However, financial issues plagued the three PRSL clubs, leading to their expulsion five weeks into the season. The International division was abolished, and the Barracuda and Blues moved to the American and National divisions, respectively. The remaining twelve teams completed the season, and Orlando City were crowned as the inaugural champions. F.C. New York, also weighed by financial issues, departed for the National Premier Soccer League at the end of the season. The American and National divisions were replaced by a single eleven-team table in the 2012 season, during which the Battery won the title.

In the 2013 season, affiliations with Major League Soccer (MLS) clubs began as part of a partnership that aimed to improve "player development, competition and the overall business" of American soccer, according to MLS executive Todd Durbin. Phoenix FC and VSI Tampa Bay FC entered the league, though both would fold with the Barracuda at the season's end – Phoenix FC had their franchise rights revoked for allegedly committing accounting fraud and wage theft, while the Barracuda and VSI suffered from financial troubles. The Barracuda's final season was one of only six in the history of soccer to be completed without a win or draw. Phoenix FC's franchise rights were awarded to Arizona United SC, who began play the following season. Orlando City earned their second USL Pro title in three years, which was seen as crucial in the club's successful bid to enter the MLS.

Choosing not to affiliate with a USL club, the LA Galaxy founded a reserve team, which entered the USL Pro in the 2014 season alongside Arizona United, Oklahoma City Energy FC, and Sacramento Republic FC. The Los Angeles Blues rebranded as Orange County Blues FC. The Republic concluded their inaugural season by winning the Championship and nearly doubling the league's average attendance record. The Eagles and Lions exited for the PDL, while Orlando City became the fifth USL club to gain promotion to the MLS. Upon their exit, the Eagles and Orlando City sold their franchise rights to the Charlotte Independence and Louisville City FC respectively.