|Number of teams||11|
|Last champions||Group A Police
Group B Busan IPark
The league started in 1990 and consisted of the five reserve teams of the K-League member clubs -POSCO Atoms, Yukong Elephants, Daewoo Royals, Hyundai Horangi and Lucky-Goldstar Hwangso. POSCO Atoms won the inaugural title, finishing two point ahead of Yukong Elephants to lift the crown. But league was lived just for 1 years and reserve teams participated in semi-professional tournament such as National Football Championship.
The competition was relaunched in a different format in 2000. Nine reserve teams were divided into two groups, Central and South. Each team in the same group met each one of the other teams four times.
For the 2009 season, The League was rename to R-League and thirteen of the fifteen K-League clubs are fielding reserve sides in the league along with the Police FC team, giving a total of fourteen participating sides. K-League newcomers Gangwon FC and Jeju United are the two sides not entering teams in 2009.
Members for 2012 season
The following 11 clubs will compete in the R-League during the 2012 season.
|A Group||B Group|
|Gangwon FC||Busan IPark|
|Incheon United||Gyeongnam FC|
|Seongnam Ilhwa Chunma||Pohang Steelers|
|FC Seoul||Sangju Sangmu Phoenix|
|Suwon Samsung Bluewings||Ulsan Hyundai|
Titles By Season
|1990||POSCO Atoms||Yukong Elephants||Choi Moon-Sik (POSCO Atoms)|
|2000||Anyang LG Cheetahs||Seongnam Ilhwa Chunma||Kim Woo-Jae (Seongnam Ilhwa Chunma)|
|2001||Seongnam Ilhwa Chunma||Anyang LG Cheetahs||Back Young-Chul (Seongnam Ilhwa Chunma)|
|2002||Anyang LG Cheetahs||Seongnam Ilhwa Chunma||Park Dong-Suk (Anyang LG Cheetahs)|
|2004||FC Seoul||Seongnam Ilhwa Chunma||Han Dong-Won (FC Seoul)|
|2005||Bucheon SK||FC Seoul||Yoo Hyun-Goo (Bucheon SK)|
|2006||Incheon United||Busan I'Park||Lee Keun-Ho (Incheon United)|
|2007||Pohang Steelers||Seongnam Ilhwa Chunma||Lee Won-Jae (Pohang Steelers)|
|2008||Incheon United||Pohang Steelers||Kang Su-Il (Incheon United)|
|2009||Incheon United||Seongnam Ilhwa Chunma||Kim Sun-Woo (Incheon United)|
Pohang Steelers (Group B Winners)
Sangju Sangmu Phoenix (Group B Winners)
Busan IPark (Group B Winners)
Titles By Club
- K-League's principle of official statistics is that final club succeeds to predecessor club's history & records.
|FC Seoul||3 (2000, 2002, 2004)||2 (2001, 2005)|
|Incheon United||3 (2006, 2008, 2009)||0|
|Pohang Steelers||2 (1990, 2007)||1 (2008)|
|Seongnam Ilhwa Chunma||1 (2001)||5 (2000, 2002, 2004, 2007, 2009)|
|Jeju United||1 (2005)||1 (1990)|
|Busan IPark||0||1 (2006)|
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- "도시연고제 도입 등 탈바꿈 시도". K-League Official Website. (Korean)
- "프로축구 2군 리그 종료 포항제철, 첫 우승 차지". Monthly Football. November 1990. (Korean)
- "대우2군 "프로가 한수위"". Donga Newspaper. 1991-11-26. (Korean)
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- "R리그 내년부터 폐지 왜?" (in Korean). Sports Dong-a. 2011-09-16.
- "The Official K-League Almanac (Korean)". K-League editorial division.