The Contenders league was launched in 2017 to be a developmental league for players aspiring to play in the
Overwatch League, with regions in North America and Europe. Teams competed in an online open qualifier known as 2017 Season Zero, where the top eight teams from Europe, the top six teams from North America, and invited teams
Team Envy and
Rogue would compete in 2017 Season 1. In 2018, Blizzard merged Contenders with existing regional tournaments into a structure to support the Overwatch League; it was divided into five divisions with 12 teams each: Korea (replacing the
Overwatch Apex tournament), China (replacing the Overwatch Premier Series), and Pacific (replacing Overwatch Pacific Championship for other Asian-Pacific countries), and adding in North America and European divisions. Prior to the second 2018 Contenders season, Blizzard added two additional divisions, Australia and South America, bringing the total to seven. Further, Blizzard gave the opportunity to the top eight teams from the Open Division within each region to compete in Contenders Trials, which would be held at the end of each Contenders season; the qualified teams would take place in a promotion-relegation tournament for the chance to compete in the next Contenders season. For its second year in 2019, Blizzard adjusted the format by reducing the number of teams in each region to eight, while dividing the North American region into East and West divisions. Blizzard also added a regional limit of the number of "import players", which are those that live outside the division's region, to a maximum of three. Blizzard made several changes for Contenders for the 2020 year after the rise of the
COVID-19 pandemic. The North America East and West regions were merged back into the single North America region, reducing the total amount of regions back to seven, and the Atlantic and Pacific Divisions were renamed to the Atlantic and Pacific Conferences. Aside from China, the regional player restrictions was also reverted, now allowing any number of players from any region to be on a team in any region. The number of two-way players allowed to compete on a given day for a team was increased from two to four. Blizzard also made a major format change for 2020 year. The qualification to make regional playoffs was changed from a
round-robin format to a point system, which includes four Contenders tournaments that will dictate the number of points a team earns based on their finishing place. After the first half of the 2020 season, Overwatch Contenders adjusted the structure of each region, with South Korea and Australia reverting back to the standard "league" format used in previous seasons, North America and Europe shifting to monthly tournaments, South America shifting to a hybrid format between the two, and China making no changes. Additionally, the Pacific region of Contenders was cancelled; Blizzard committed to "exploring ways to build a unique experience for Pacific players" in the region. In February 2021, South America Contenders was cancelled, leaving only five regions. Teams in South America, as well as the previously cancelled Pacific, would be able to qualify for international Contenders tournaments via third-party tournaments in their respective regions. For the 2022 year, Overwatch Contenders, along with the Overwatch League, will be played on a beta build of
Overwatch 2. It will also shift to an open-registration format, with the top teams from the 2021 season being directly invited to the first event of the year without needing to qualify. On January 23, 2024, Blizzard announced that the Overwatch League and Contenders had officially folded; on the same day, they would announce a multi-year deal with
ESL FACEIT Group and WDG Esports to create the
Overwatch Champions Series (OWCS) to replace the OWL. == Structure and seasons ==