The 2006 K League was the 24th season of the K League, which kicked off on March 12. The format of the regular season and playoffs was the same as the one used in the 2005 season. It took a break for the 2006 FIFA World Cup in June and July. The playoff games were held in November.
The 2005 K League was the 23rd season of the K League. It kicked off on May 15, and was finished on 4 December. The format of the regular season and championship playoffs was the same as the one used in the 2004 season.
The 2007 K League was the 25th season of the K League. The format of the league was changed from two stages to single league since this season. Each team played 26 matches against every other teams under the home and away system. After the regular league was finished, the top six clubs qualified for the championship playoffs to determine champions.
The 1993 Korean League Cup, also known as the Adidas Cup 1993, was the third competition of the Korean League Cup.
The 2004 K League was the 22nd season of the K League. The previous single format of the league was replaced by two regular stages and playoffs in this season. Each team played a total of 12 matches against every other team in each stage. After both stages were finished, two winners and the top two clubs in the overall table qualified for the playoffs.
The 1984 Korean Super League was the second season of top football league in South Korea. A total of eight teams participated in the league. Six of them were professional teams, and the other teams were semi-professional teams. It began on 31 March and ended on 11 November. It divided into two stages, and winners of each stage qualified for the championship playoffs. It gave 3 points for a win, 2 points for a draw, and 1 point for a draw without a goal.
The 1985 Korean Super League was the third season of top football league in South Korea. A total of eight teams participated in the league. Six of them were professional teams, and two of them were semi-professional teams.. It began on 13 April and ended on 22 September.
The 1986 Korean Football Festival was the fourth season of the top football league in South Korea. Six teams participated in this season. Five of them were professional teams and one was a semi-professional team. Hallelujah FC, the first South Korean first professional football club, changed its status to a semi-professional club and withdrew from the league afterwards. Sangmu FC, run by the Army also withdrew, leaving Hanil Bank as the only semi-professional team in the league.
The 1987 Korean Professional Football League was the fifth season of the K League. Before the start of this season, the Korean Professional Football Committee was separated from the Korea Football Association. A total of 5 professional teams participated in the league. Hanil Bank withdrew the league from this season. It began on 28 March and ended on 8 November 1987. It was operated with the home and away system for the first time.
The 1990 Korean Professional Football League was the eighth season of K League since its establishment in 1983. The South Korean clubs relocated their hometowns from provinces to cities in this year. Daewoo Royals also hired Frank Engel, the first foreign manager in the league.
The 1992 Korean Professional Football League was the tenth season of K League since its establishment in 1983.
The 1994 Korean League was the twelfth season of K League since its establishment in 1983.
The 1995 Korean League was the 13th season of K League since its establishment in 1983.
The 1996 Korean Professional Football League was the 14th season of K League since its establishment in 1983. South Korean government and the Korean Professional Football Federation introduced a decentralization policy to proliferate the popularity of football nationally in preparation for the 2002 FIFA World Cup, which they wanted to host, so some clubs located in the capital Seoul moved to other cities according to the new policy in this season.
The 2002 K League was the 20th season of the K League. South Korea postponed its football league until July to prepare the 2002 FIFA World Cup, which was hosted by it.
The 1998 K League was the 16th season of South Korean professional football league, and was the first season to have been named the "K League". This season is called the "Renaissance of K League" in South Korea. Despite the poor performance of South Korea team at the 1998 FIFA World Cup, the 1998 season of K League recorded a total of 2 million spectators with young star players' popularity for the first time. The three most popular players of them Ko Jong-soo, Lee Dong-gook, and Ahn Jung-hwan were called the "K League Troika".
The 1999 K League was the 17th season of K League. In the second leg of the playoffs final, Saša Drakulić's golden goal scored with his hand caused controversy. His handball was recognized as a goal by the Chinese referee Sun Baojie, and it directly determined Suwon's league title. Under the influence of controversy, Drakulić failed to win the MVP Award.
The 2000 K League was the 18th season of K League.
The 2008 K League was the 26th season of the K League. The regular season and playoffs' format was the same as the one used in the 2007 season. It began on March 8, and the final of the playoffs finished on 7 December.
The 2010 Korean League Cup, also known as the POSCO Cup 2010, was the 23rd competition of the Korean League Cup. It began on 22 May 2010, and ended on 25 August 2010.
Lee Sang-yoon 
Valeri Sarychev 
Choi Young-il