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| January 31 (approx.) | ||
|---|---|---|
 KCP | Breechy, FRIMJ, LiammD, RiRi, and Seannyy leave. | |
 IVY | SanTy joins. | |
| January 31 | ||
 Skyz & Landon Collins  Maux & Todd Gurley in the In The Know Bowl 2020. | ||
 HYXR | Ethan2Nice leaves. | |
 FG | Firi, Lucho, NanZ, Rizee, SanTy, and Swizzy leave. | |
 NexT | Crawly and DreeyK join. | |
 VrT | Couti joins. | |
 LAV | Cornz, Crnky, Deezy, Neeey, Tisow, and Azerinho (Coach) join. | |
 QLS | Diixblo joins. Lumbast leaves. | |
 TFG | Hecful, Jxnz, Matix, ShuKz, and Vokado join. | |
| January 30 | ||
 SIC | Assassin, Denail, Example, Siloh, and SinnR leave. | |
| NexT | Horid (Player to Coach) changes position. Vixen leaves. | |
 RNL | Fero, Parasite, Prolute, Spacely, and Spart leave. | |
 FNX | SamBaldy leaves. | |
 VTN | Pepo leaves. | |
 WB | Gudnite leaves. | |
 RBL | Mochila leaves. | |
 ANI | Pazy retires. | |
| January 29 | ||
 EG | Lightning leaves. | |
 ASP | Davpadie, Standy, and Zinx leave. | |
 4LF4 | Crawly and DreeyK leave. | |
 6G | Onyx, PaulEhx, Teskiy, and Venom join. FA5TBALLA, Owakening, Reaper, and Willett leave. | |
| January 28 | ||
 III | Magik leaves. | |
 ATH | Onyx, PaceR, PaulEhx, Teskiy, Venom, and Ramby (Coach) leave. | |
 DIV | Jintroid, Newbz, and TwiZz leave. | |
| January 27 (approx.) | ||
 GETB | ColeChan leaves. | |
 PRML | Charm, Conbix, COutside, LilFoot, and Optional leave. | |
 TIME | Ambient, Aries, CaLiFa, Shocked, and VeXeD leave. | |
| January 27 | ||
 RRA | endurAAA (temporary substitute) leaves. | |
 GLTY | aHTracT, Foncho, MonGo, Morty, and Phenom leave. | |
 OCG | Gunsii leaves. | |
 CE | Anthrax, Copier, ExiB, Kade, and Pawns leave. | |
 J4L | Nova leaves. | |
 RYS | Aether, Alfoon, Glaaix, Ninjaso, and Zappy join. | |
| January 26 | ||
 NexT Team  4LF4 Team in the ArenaOn Open 2020. | ||
 Team Singularity  Hybrid Black in the CDC Launch Weekend Open 2020. | ||
| January 25 | ||
 PAR | Louqa, Denz, Shockz, Zed, and KiSMET announced as starting roster. Phantomz and Breszy move to substitutes. | |
 Esports Engine to assist in running Call of Duty Challengers 2020 events. | ||
 21 | Derp, Edz, RanGer, Raven, and Wenn join. Jimboz joins as substitute. | |
| January 24 | ||
 OGLA | Kenny renames to Kuavo. | |
 DAL | Crimsix renames to C6. | |
| Call of Duty League 2020 Season events will be streamed exclusivity on YouTube. | ||
 ATVI | Lottie Van-Praag (Host) joins. | |
 TRI | FeLo, Nagafen, Parzelion, Royalty, and Xotic join. | |
 NRG | BigTymer (Content Creator) joins. | |
 CHI | Team partners with GameFuel. | |
 MF | Beastn, Damage, Nimble, Restalling, and Zepa join. | |
 EG | Xotic leaves. | |
| January 23 | ||
| GLTY | aHTracT and MortyCB join. | |
 ATL | Team partners with GameFuel. | |
| RNL | Fero, Parasite, Prolute, Spacely, and Spart join. | |
| RRA | Defrag, Nolson, and Weeman join. MadCat and Seany are loaned from LDN Royal Ravens. | |
| LDN | MadCat and Seany are loaned to Royal Ravens Academy. | |
| RRA | endurAAA joins as temporary substitute for CDC Launch Weekend Open 2020, replacing MadCat because of visa issues. | |
| CHI | Team partners with Turtle Beach. | |
 TOR | Team partners with Universal Music Canada. | |
| Call of Duty League Ruleset v1.6 is released. | ||
 R5 | Brxdy joins. Taz leaves. | |
| PRML | Charm, Conbix, COutside, LilFoot, and Optional join. | |
| ATVI | TeeP (Analyst) joins. | |
| January 22 | ||
| J4L | DraMa and Nova join. 2ReaL and KlinK leave. | |
| CE | Anthrax, Copier, ExiB, Kade, and Pawns join. | |
 HYB B | Cells, Charullz, Hollow, MackMelts, and Stamino join. | |
| AFA | Abstract, TurnUp2eZ, and Zaptius join. GRVTY and JurNii join from main roster. | |
| ATL | GRVTY and JurNii move to academy roster. | |
| ATVI | StuDyy (Analyst), Jessica Brohard (Interviewer), and Katie Bedford (Desk Host) leave. | |
| HYB | Spoof, Super, and Vivid join. Pandur and Proto are loaned from SEA Surge. | |
 SEA | Pandur and Proto are loaned to Hybrid Gaming. | |
| ATVI | Benson (Caster) and Chance (Caster) will remain with the team. | |
| January 21 | ||
| TOR | Methodz, Loony, Classic, Cammy and MeTTalZ announced as starting roster. Bance, Brack, CleanX, Lucky, and Mayhem move to substitutes. | |
| ATVI | Miles Ross (Caster) and Momo (Caster) will remain with the team. | |
| OCG | Archivs, Beehzy, Gunsiii, Holler, and Jimbo join. | |
| RBL | Knight, LlamaGod, and Mochila join. Exceed and TTinyy are loaned from MIN RØKKR. | |
 MIN | Exceed and TTinyy are loaned to Rebel Esports. | |
 MYTH | Disarray, Hicksy, Iviano, LewTee, and YellowBeanBag join. | |
 RUSH | Hunt (Player to Streamer) changes position. Nicochan moves to starting roster. | |
| January 20 (approx.) | ||
 BLSD | Astatix, Bondy, Entice, Imagine, and Reap leave. | |
 OVRT | Cruze, Fate, Hybrid, Killerpie, Tyson, and Camerxn (Coach) leave. | |
| TIME | Ambient, Aries, CaLiFa, Shocked, and VeXeD join. | |
| January 20 | ||
| RBL | Team acquires  Aspire eSports. | |
| ASP | Team is acquired by  Rebel Esports. | |
 BM | Afro, Braaain, Creza, Deleo, and Niall join. | |
 3G | Afro, Braaain, Creza, Deleo, and Niall leave. | |
| ATVI | Maven (Caster) and MerK (Caster) will remain with the team. | |
 VAL | Beseatey, Melvvyn, Powerhouse, Shaun, Snakee, and Wicko (Coach) join. | |
 N2E | NebuR, PhoeniixX, Pini, Sk1LL, and Smurf join. | |
 SZ | Ngt joins. | |
| January 19 | ||
NexT Team  All Knights in the ArenaOn Série A 2019 Season 6 Playoffs. | ||
 SNG | Sweeper (Analyst) joins. | |
 Team Nocturnal  FURY in the XP Esports AUSLAN Brisbane 2020. | ||
| January 18 | ||
 TA | Dough, kLoH, Peachuhs, Smoothay, and SnowGodlike leave. | |
 T10 | Ciar, Dimm, Elusive, Theo, and Vitxll join. | |
 Cosmic Wolf eSports  Top Prospect in the Helix eSports Monthly January 2020. | ||
efgdvhvef  Carnage Gaming in the GameBattles Premium $1000 5v5 CDL Variant 2020-01-18. | ||
 PDHM Gaming  Team B3WARE in the AfterDark eSports Miami Open 2020. | ||
 BDS | Natshay, rizK, YuuzL, ZaaQ, Zeeked, and ZylewR (Coach) join. | |
| January 17 | ||
 NLM | Galli, Jordan, Litzuh, and Tia join. | |
 eNN | Bkun, HEARTs, K1tty, Kaiser, and ZACK join. | |
| January 16 | ||
 ETR | TeRReMoTo leaves. | |
 RNG | Organization returns to Call of Duty. Crimzah, Fighta, Pred, Setzyy, and Swifty join. | |
| January 15 (approx.) | ||
 MVP | CuRRent joins. | |
 LGN | Revolt (Content Creator) leaves. | |
| January 15 | ||
 APO | Billy, Henry, Jambo, LouiCM, and Revolt join. | |
| January 14 | ||
| ATVI | NAMELESS (Analyst) will remain with the team. | |
| Call of Duty League Ruleset v1.5 is released. | ||
 ELI | Aroma, Chaaxter, Cxllum, Harry, and Hawqeh join. | |
| January 13 | ||
 LAG | Ricky (Assistant Coach) is added to the official roster as substitute. | |
 FLA | Atura (Coach) is added to the official roster as substitute. | |
| CHI | Sender (Head Coach) is added to the official roster as substitute. | |
| VrT | Couti leaves. | |
 RVNS | Torress rejoins. | |
| EG | Team signs roster of  Able2Mutate. JLags, Legal, Lightning, Miyagi, and Sher join. | |
 A2M | Roster is signed by  Encrypted Gaming. JLags, Legal, Lightning, Miyagi, and Sher leave. | |
 CG | BodDenT (Coach) joins. eNudies (Coach) leaves. | |
| January 12 | ||
 SRP | AN4W1N, Laulentin, Nut, Soybad, and Vinxer join. | |
| TA | Dough, kLoH, Peachuhs, Smoothay, and SnowGodlike join. | |
 For The Win Esports  Electrify Esports in the Lisbon COD Party 2020. | ||
| MooseAndGoose MagicClanPrevails in the GameBattles Premium $1000 4v4 S&D 2020-01-12. | ||
 Athaim Gaming Carnage Gaming in the National Gaming Events Season 8 Playoffs. | ||
| wedoitforari123 Emerald City in the GameBattles NA Challengers: 2000 Series Tournament #7. | ||
| January 12 (approx.) | ||
| A2M | Lightning joins. VeXeD leaves. | |
| January 11 | ||
 Team WaR Team Singularity in the GameBattles EU Challengers: 2000 Series Tournament #7. | ||
 ISN | Deelo, Drazah, Kyzer, OPTIMUM, and Perform join. | |
| B2B Shelby v5 in the GameBattles AP Challengers: 2000 Series Tournament #7. | ||
| January 10 | ||
 ITL B | Atom, Bullkee, Dorchak, Mind, and PDasson join. | |
| January 8 | ||
| NJROD January 2020 5v5 is postponed. | ||
| DIV | Destiny, Jintroid, Newbz, Theory, TwiZz, and Griffin (Manager) join. | |
| OGLA | Pacman (Head Coach) joins. | |
| ATVI | Pacman (Analyst) leaves. | |
| Call of Duty Challengers tournaments announced to take place at each Call of Duty League Home Series. | ||
| Revised Call of Duty League schedule is released. | ||
| January 7 | ||
 MOG | 47, aHTracT, Bullseye, Diamondcon, and Remy join. | |
 KWK | Zappy joins. Torress leaves. | |
| Aydan's Team Scump's Team in the Hitchs Birthday Bot Bash. | ||
| January 6 | ||
| KCP | Breechy, FRIMJ, LiammD, RiRi, and Seannyy join. | |
 Peak | RiRi leaves. | |
| RYS | Draken, Rakzyy, Realize, Relays, and StaniuM join. | |
| January 6 (approx.) | ||
 DPTH | Cruelty, Crysis, kLoH, Stolly, and Wellyy join. | |
| January 5 (approx.) | ||
 NRX | Khenji and Woopiiee join. Ludy and Paii leave. | |
| NRX | JAYZEE renames to J4YZEE. | |
| January 5 | ||
 Tactical eSports  Able2Mutate in the AGN 2020 Fall League Playoffs. | ||
| Wedoit4arii Athaim Gaming in the GameBattles NA Challengers: 2000 Series Tournament #6. | ||
| Team WaR 2k Funday ;) in the GameBattles EU Challengers: 2000 Series Tournament #6. | ||
| January 4 | ||
| BLSD | Astatix, Bondy, Entice, Imagine, and Reap join. | |
 Sicario Gaming PDHM Gaming in the SoCal eSports Community LAN #1. | ||
| TBA Soon Shelby v4 in the GameBattles AP Challengers: 2000 Series Tournament #6. | ||
 WaR | Denza, Dqvee, Moose, Peatie, and Vortex join. | |
 AK | ExyLon joins. | |
 MAF | ExyLon leaves. | |
| January 3 (approx.) | ||
| GETB | Apox, Believe, ColeChan, and Goonjar join. | |
| January 3 | ||
| SEA | Bob Morris Jr (Director of Business Operations) joins. | |
| AK | Rakzyy leaves. | |
| January 2 | ||
 TRB | Ferg (Content Creator) and Hawksnest (Content Creator) join. | |
| January 1 (approx.) | ||
 GFIN | Lottie Van-Praag (Caster) leaves. | |
 PrB | Martino leaves. | |
| MAF | Blitz leaves. | |
 AMS | Avo joins. | |
 TH | DREAL (Coach) joins. | |
| January 1 | ||
 TaL | Buller, envdiaN, PuNi, SupeR, and YaKo join. | |
| ATH | Ramby (Coach) joins. | |
 IMP | JHaZe, Penn, ReeKuu, Spitzoli, and Stuntron join. | |
| ATVI | Puckett (Caster) leaves. | |
| CG | Druxy, EFatal, Nightmare, Pure, and Ryza join. | |
 FYC | Bazerk, Dekk0s, KALANI, LuNaTiC, and ReguLate join. | |
 RG |  Rampage Gaming renames to Rampage Gaming. | |
