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| October 31 | ||
|---|---|---|
 CHI | Team reveals branding as the  Chicago Huntsmen. | |
 LAG | AquA joins. | |
 FaZe | Ben Nissim (Manager) leaves. | |
 SPY | AquA leaves. | |
| October 30 | ||
 KCP | Chaaxter, Control, Cxllum, Harry, and Hawqeh join. | |
 SEA | Team reveals branding as the  Seattle Surge. | |
 VrT | Traixx joins. | |
 FG | Traixx leaves. | |
| October 29 | ||
 NRX | CRUSH, iDra, JAYZEE, Kyaaah, Ludy, and Paii join. | |
| VrT | Kheyze leaves. | |
| Call of Duty League Ruleset v1.1 is released. | ||
| Call of Duty League Ruleset v1.0 is released. | ||
 ATH | Conbix, Onyx, PaulEhx, Return, and Venom join. | |
 MIN | Team reveals branding as the  Minnesota RØKKR. | |
  Crimsix & Shotzzy  Aydan & Lacefield in the BoomTV Code Red 2019-10-29. | ||
| October 28 | ||
 MAF | Blitz, Draken, ExyLon, Relays, StaniuM, and Supreeme join. | |
 NLM | Predax joins. | |
 FLA | Team reveals branding as the  Florida Mutineers. | |
| October 27 | ||
 RUSH | Storied (Coach) rejoins. Luke (Player to Streamer) changes position. GreedZz (Coach to Player) changes position. | |
 SIC | Assassin, Denail, Example, Siloh, and SinnR join. | |
| The East is Strong TeamProtein in the ACGL 2000 Series 2019-10-27. | ||
 Dallas Empire CuteRat9254 in the CheckMate Gaming Elite $2500 5v5 S&D 2019-10-27. | ||
Dallas Empire  Atlanta FaZe in the GameBattles Premium $4500 5v5 S&D Kickoff 2019-10-27. | ||
| October 26 | ||
 AK | DreaMz joins. | |
 ATL | Team reveals branding as the  Atlanta FaZe. aBeZy, Cellium, MajorManiak, Priestahh, and Simp join. | |
| FaZe | Cellium and Priestahh leave. | |
 Gen.G | MajorManiak leaves. | |
 eU | aBeZy and Simp leave. | |
Dallas Empire  OpTic Gaming Los Angeles in the CheckMate Gaming Elite $2500 5v5 S&D 2019-10-26. | ||
| its boots bud nograznaraidpls in the GameBattles Premium $1750 5v5 S&D Kickoff 2019-10-26. | ||
Dallas Empire  Minnesota RØKKR in the UMG Gaming Prime $1500 5v5 S&D Kickoff 2 2019-10-26. | ||
| October 25 | ||
 OG | TeePee renames to TeeP. | |
| Modern Warfare is released. | ||
 OXY | Anthrax, Copier, ExiB, Kade, and Pawns join. | |
 MVP | ChieF, GiLberT, Moke, and NQC join. | |
| AK | Rakzyy joins. Resingz leaves. | |
 FRZN | Bafundo, Ethan2Nice, Jumpy, Radial, and Sweat join. | |
 QLS | Wartex joins. | |
| LAG | ACHES joins. | |
 fabE | Killicious, Kivi, Puri, Swift, and TPiece join. | |
| Dallas Empire GetBusyStayBusy in the UMG Gaming Prime $1500 5v5 S&D Kickoff 1 2019-10-25. | ||
| October 25 (approx.) | ||
 RBL | HumanJesus leaves. | |
| October 24 (approx.) | ||
 GETB | 2Real, Beehzy, Believe, MRuiz, and ProFeeZy join. | |
| October 24 | ||
 RSG | RanGer (Content Manager) joins. | |
| AK | Supreeme leaves. | |
 OGLA | Team reveals branding as  OpTic Gaming Los Angeles. Dashy, JKap, Kenny, SlasheR, and TJHaLy join. | |
| CHI | Arcitys, Envoy, FormaL, Gunless, and Scump join. | |
| MIN | Asim and REPPIN (Analyst,Assistant Coach) join. Exceed and TTinyy join as substitutes. | |
 TOR | Team reveals branding as  Toronto Ultra. Bance, Brack, Cammy, Classic, CleanX, Loony, Lucky, Mayhem, Methodz, and MettalZ join. | |
| RBL | TTinyy (Streamer) leaves. | |
 SNG | CleanX leaves. | |
| FaZe | Asim leaves. | |
| Gen.G | Envoy leaves. | |
 LV | Leisia joins. | |
 CAG | Leisia leaves. | |
| SPY | Loony leaves. | |
 100T | Kenny and SlasheR leave. | |
 EG | JKap leaves. | |
| OG | Dashy and TJHaLy leave. | |
 LG | Brack, FormaL, John, and Gunless leave. | |
| LG | Gunless returns from loan to Team Envy. | |
 ENVY | Gunless' loan from Luminosity Gaming ends. | |
| Dallas Empire RightHerring3230 in the CheckMate Gaming $2300 5v5 S&D 2019-10-24. | ||
| Cant Teach That Dallas Empire in the GameBattles $1654 5v5 S&D Kickoff 2019-10-24. | ||
| :) S1MWSquad in the GameBattles $500 5v5 S&D 2019-10-24. | ||
| October 23 | ||
| CAG | ABERNz leaves. | |
 EFY | Aether, Alfoon, Gele, Ninjaso, and HerNaN (Coach) join. | |
 PAM | Gele, Glaaix, and Ninjaso leave. | |
| October 22 | ||
 OBT | Diixblo, Dirgah, Infernal, Legendz, and Paradise join. Cliffey, JustGeorge, Logicxn, SCreative, and TheJDS97 leave. | |
| QLS | Predax leaves. | |
| October 21 | ||
 4LF4 | Crawly leaves. | |
 NY | Team reveals branding as the  New York Subliners. | |
| SEA | Apathy, Enable, Karma, Octane, Slacked, and Nubzy (Head Coach) join. | |
| 100T | Enable and Octane leave. | |
| EG | Apathy leaves. | |
| OG | Karma leaves. | |
| LG | Slacked leaves. | |
| October 20 | ||
 GTZB | Alexisss, KPainz, Neto, Stun, Varandas, and Timmy (Manager) join. | |
 Virtue Gaming  Ivyaert Esports in the TDJ La Liga Pro 2019 Playoffs. | ||
| October 19 | ||
 DAL | Team reveals branding as the  Dallas Empire. | |
 Shorys Gaming Gunson Alliance in the MML Variant 2019-10-20. | ||
| October 18 | ||
| LAG | Team reveals branding as the  Los Angeles Guerrillas. | |
| DAL | Crimsix joins. | |
| LV | AliceWonderland leaves. | |
| OG | Crimsix leaves. | |
| October 17 | ||
| DAL | iLLeY joins. | |
| NY | Censor joins as substitute. | |
 eU C | iLLeY leaves. | |
| FaZe | Censor (Streamer) leaves. | |
 HTCS | Lucky leaves. | |
| October 16 | ||
| AK | ExyLon leaves. | |
 TaL | YellowBeanBag leaves. | |
| DAL | Huke joins. | |
 N7 | Clamp, Luckycharmz, Nike, and XTrAJ join. | |
| HTCS | JurNii leaves. | |
| 3pros1fan PotentCoati8714 in the CheckMate Gaming NexusLinkUSA Elite $1000 4v4 Variant 2019-10-16. | ||
| ENVY | Huke leaves. | |
| October 15 | ||
 LDN | Team reveals branding as the  London Royal Ravens. | |
| DAL | Shotzzy joins. | |
| SPY B | Shotzzy leaves. | |
| October 14 | ||
| DAL | Clayster joins. | |
 WaR | Defrag leaves. | |
| HTCS | Wartex leaves. | |
| eU | Clayster leaves. | |
| October 14 (approx.) | ||
 Eff | envdiaN, PuNi, Sukry, SupeR, and YaKo leave. | |
| October 13 | ||
 DIA | Cxnspiracy, Farns, Infinit, Spike, and Xerrtz join. | |
 Black Claw eSports  Efficiency Team in the EEG European Cup 2019. | ||
| October 12 | ||
| OG | Scump leaves. | |
| October 10 | ||
| MIN | Alexx joins. | |
Virtue Gaming  ACE1 in the TDJ La Liga Pro 2019 Regular Season. | ||
| ENVY | Fero leaves. | |
| October 9 | ||
 TOT | BlueIce, Flutter, Luis, Swag, Tectonic, Tynxii, and Vitaly join. | |
| RBL | 2ReaL leaves. | |
| LDN | Padrman (Social Media Manager) joins. | |
 HYB | Beehzy leaves. | |
 ELV | MRuiz leaves. | |
| October 6 | ||
 USG | ChieF, Duffle, NiRu, Virullent, and Zyirue leave. | |
 TH | Creza leaves. | |
 RG | Axis, Izzul, Kira, Rainyz, RanGer, and SeaN leave. | |
| RG | RanGer (Owner) leaves. | |
Virtue Gaming  All Knights in the Campeonato Sul-Americano 2019. | ||
 White Rabbit Gaming  Bravado Gaming in the VS Gaming Championship 2019. | ||
| October 5 | ||
| ELV | ProFeeZy leaves. | |
| Tidal eSports Keyboarders in the AfterDark eSports Naples Ghosts Throwback 2019. | ||
| October 4 | ||
| ELV | Wailers leaves. | |
 PrB | Soldier joins. | |
| October 3 | ||
 PAR | Breszy, Denz, KiSMET, Louqa, Phantomz, Shockz, and Zed join. | |
 E6 | Breszy and KiSMET leave. | |
| FaZe | Phantomz leaves. | |
 REC | Denz and Zed leave. | |
| October 2 | ||
 NRG | Blake Cissel (Content Creator), Hitch (Content Creator), and Jorge Estrada (Content Creator) join. | |
| 6yrgrindersumadlol BCloneChallenge in the CheckMate Gaming Elite $1000 4v4 PHiZZURP Memorial Tournament. | ||
| October 1 | ||
| Call of Duty: Mobile is released. | ||
| HTCS | MethodZ (Player to Content Creator) changes position. | |
| October 1 (approx.) | ||
 FTW | MacGab leaves. | |
 SNT | Vikul joins. Alfoon leaves. | |
| NLM | VeloX (Co-Owner) joins. | |
| LV | WENGER 9 leaves. | |