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LCK Challengers League 2021 (LCK CL 2021) is the first year of Korea's secondary league featuring rosters from all ten LCK organizations.
Spring
LCK CL 2021 Spring Standings | ||||
|---|---|---|---|---|
| Team | Games | Str | ||
| 1 |  T1 Challengers | 15 - 3 | 83% | 2W |
| 2 |  Gen.G Challengers | 12 - 6 | 67% | 2W |
| 3 |  Hanwha Life Esports Challengers | 12 - 6 | 67% | 5W |
| 4 |  KT Rolster Challengers | 10 - 8 | 56% | 2L |
| 5 |  DRX Challengers | 9 - 9 | 50% | 3W |
| 6 |  Liiv SANDBOX Challengers | 8 - 10 | 44% | 1L |
| 7 |  Nongshim RedForce Challengers | 8 - 10 | 44% | 1W |
| 8 |  Fredit BRION Challengers | 8 - 10 | 44% | 3L |
| 9 |  DWG KIA Challengers | 6 - 12 | 33% | 2L |
| 10 |  Afreeca Freecs Challengers | 2 - 16 | 11% | 8L |
Summer
LCK CL 2021 Summer Standings | ||||
|---|---|---|---|---|
| Team | Games | Str | ||
| 1 | Gen.G Challengers | 14 - 4 | 78% | 5W |
| 2 | Afreeca Freecs Challengers | 12 - 6 | 67% | 2W |
| 3 | Nongshim RedForce Challengers | 10 - 8 | 56% | 3L |
| 4 | KT Rolster Challengers | 9 - 9 | 50% | 3W |
| 5 | Liiv SANDBOX Challengers | 9 - 9 | 50% | 1L |
| 6 | DRX Challengers | 8 - 10 | 44% | 2L |
| 7 | Fredit BRION Challengers | 8 - 10 | 44% | 1W |
| 8 | Hanwha Life Esports Challengers | 8 - 10 | 44% | 1W |
| 9 | DWG KIA Challengers | 7 - 11 | 39% | 7L |
| 10 | T1 Challengers | 5 - 13 | 28% | 1L |
