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| September 30 | ||
|---|---|---|
 F/A | Defrag retires from Call of Duty esports to compete in Halo. | |
| September 28 | ||
 Team Tommey  Team Fifakill in the Dallas Empire Jack Links Season 5 Invitational. | ||
| September 27 | ||
 WaR | JurNii, Lucky, MettalZ, and YaKo leave. | |
| September 26 | ||
 Ottawa Uni.  Independence CC in the Mutineers x CCL Invitational 2021. | ||
| Luci September in the UMG Gaming $500 Prime 2v2 S&D 2021-09-26. | ||
| September 25 | ||
 ANAR | Clout (Coach) leaves. | |
| lurkinjett Oh My Lord in the GameBattles $1000 2v2 Saturday Showdown 2021-09-25. | ||
| September 22 | ||
 NRG | HusKerrs (Streamer) leaves. | |
| Team Exzachtt Team Tommey in the Twitch Rivals Warzone Season 5 Showdown NA. | ||
| September 21 | ||
 S9 | sFurr and Zendaya join. | |
| S9 | Team signs roster of  Crackheads. b1ngo, ConcepT, Sciia, Smokii, x3Jasmine, and Zh3ngYu join. | |
 CRAK | Roster is signed by  SEM9. b1ngo, ConcepT, Sciia, Smokii, x3Jasmine, and Zh3ngYu leave. | |
CODA |  The Originals The Avengers in the CODAgent £300 4v4 SND 2021-09-21. | |
| September 20 | ||
 coL | TimTheTatman (Co-Owner) joins. | |
 SEA | Accuracy, Mack, Pred, and Sib join. | |
 RNG | Pred leaves. | |
 ATL | Sib leaves. | |
 RNT | Minho joins. | |
| F/A | Hyzzn retires. | |
 ASTR | BEVZZZ leaves. | |
| September 19 | ||
 Team Anarchy and  STMN Esports qualify for the Call of Duty Mobile World Championship 2021. | ||
| Team Anarchy STMN Esports in the Call of Duty Mobile World Championship 2021 EU Finals. | ||
| September 18 | ||
 Shady Kings Render x EBeasty in the AfterDark eSports Last Stand Miami 2021. | ||
| Ye YermStun in the GameBattles $1000 2v2 Saturday Showdown 2021-09-18. | ||
| September 17 | ||
 NOVA | cZSpy (Coach) joins. | |
| SEA | Fenix (Coach) and Novus (General Manager) join. | |
 NY | Mack leaves. | |
| September 16 | ||
 KCP | Anthrax, Destiny, and Kade leave. | |
 HTCS | Daga (Content Creator) joins. | |
| September 15 (approx.) | ||
 TSM | Cyzu, Gamer, Hihi, Slothy, Solid, TipWrath, and Haxs (Coach) leave. | |
 MF | Sponsord leaves. | |
| September 15 | ||
 BLU | Kensh1 and Skerd join. | |
| ANAR | Clout (Coach) joins. | |
| KCP | Zinx joins. | |
| Chowh1 JezuzJrr in the World Series of Warzone Season 1 EU SoloYolo. | ||
| Team Recrent Team Jukeyz in the World Series of Warzone Season 1 EU Duos Captain's Cup. | ||
| Methodz & Daga Joshiil1 & Coyle in the World Series of Warzone Season 1 EU Duos. | ||
| September 14 | ||
 M42 | Team signs roster of  Gaijin Rogue. Flash, Glowy, Kaso, Miki, and MythiL join. | |
| M42 | Roster is signed by  M42 Esports. Flash, Glowy, Kaso, Miki, and MythiL leave. | |
 TOR | Bance, Cammy, CleanX, and Insight will remain with the team. | |
| September 13 | ||
 VOLT | Breszy, D3L1V3R, and Hosterz leave. | |
| MF | Middoh leaves. | |
| HusKerrs & Newbz JoeWo & Stukawaki in the JoeWo: Battle for the Crown. | ||
 MV3 | ReeaL leaves. | |
| September 12 | ||
 TB | Jintroid leaves. | |
 Maycam Evolve  Royal Frog in the South CoD League Season 2 Playoffs. | ||
| F/A | Johnny and Bullseye retire from Call of Duty esports to compete in Halo. | |
 Rimo Sadewa  DG Esports in the Garena Major Series Season 5. | ||
| September 12 (approx.) | ||
 IMP1 | Stukas leaves. | |
| September 11 | ||
 QLS | Team signs roster of  Team Legacy. Napalz, Panna, Patronix, Reberse, Spectre, Zed, StaZz (Manager), and Woodpeacker (Manager) join. | |
 LEG | Roster is signed by  QLASH. Napalz, Panna, Patronix, Reberse, Spectre, Zed, StaZz (Manager), and Woodpeacker (Manager) leave. | |
| 2Peat We Definitely Are in the GameBattles $1000 2v2 Saturday Showdown 2021-09-1. | ||
| September 10 | ||
 LAT | Envoy joins. Drazah will remain with the team. | |
| September 9 | ||
 MIN | Attach, MajorManiak, Priestahh, and Standy will remain with the team. | |
| LAT | Octane joins. | |
| MV3 | Sukry, SupeR, Sikotik (Coach), and Guille (Manager) leave. | |
 VrT | FaKeZ and Feezin leave. | |
| September 8 | ||
| BLU | Team signs roster of  Ultimate E-Pro. Eiji, F1ex, JaBen, Tin, Yato, and Yobabs join. | |
 UEP | Roster is signed by  Blacklist International and becomes Blacklist Ultimate. Eiji, F1ex, JaBen, Tin, Yato, and Yobabs leave. | |
| NOVA | Clout (Coach) leaves. | |
 Autentii Esports  The SoulKingz in the Copa Colombia 2021. | ||
| September 7 | ||
| LAT | Novus (Analyst) leaves. | |
 EvL | Destinyy (Coach) joins. | |
| September 6 | ||
| VOLT | Aiden joins. Lynz leaves. | |
 LAG | Asim, Gunless, Huke, and SlasheR join. | |
| LAT | Huke leaves. | |
| NY | Asim leaves. | |
| September 5 | ||
 ARP Gaming and  NYSL Mayhem qualify for the Call of Duty Mobile World Championship 2021. | ||
| ARP Gaming NYSL Mayhem in the Call of Duty Mobile World Championship 2021 NA Finals. | ||
| ff Gekki in the GameBattles $1250 2v2 CDL Rules Europe 2021-09-04. | ||
| AllYouKidsSuck SRK in the GameBattles $1250 2v2 CDL Rules North America 2021-09-04. | ||
Ultimate E-Pro  Omega Esports in the Garena Philippines Summer Championship 2021. | ||
 Mountain Dew  Raptors.DNS in the Garena TWHKMO Summer Championship 2021. | ||
| September 4 | ||
 FLA | Willett (Assistant Coach to Head Coach) changes position. | |
 AK | Supreeme leaves. | |
 Sharper Esport  WDC.Freeslot in the Garena Ultimate Warfare 2021. | ||
| September 3 | ||
| TSM | Team signs roster of  Truly. Cyzu, Gamer, Hihi, Slothy, Solid, TipWrath, and Haxs (Coach) join. | |
 TRU | Roster is signed by  TSM. Cyzu, Gamer, Hihi, Solid, TipWrath, Triton, and Haxs (Coach) leave. | |
 PAR | Theory (Coach) will remain with the team. | |
| FLA | Atura (Coach) leaves. | |
| September 2 | ||
 GOD | Hawkz, Keyotk, and Plin join. Araujo, Mihawk, and Noel leave. | |
| MV3 | EriKBooM leaves. | |
 UYU | Cruze leaves. | |
| F/A | Zed retires. | |
| September 1 (approx.) | ||
 TaL | Gismo, Harry, and Nastie leave. | |
 AMT | Adapt joins as temporary substitute for Call of Duty Mobile World Championship 2021 Garena Finals. | |
 ORG | Chain, Grad, Hawqeh, and Rafi leave. | |
 DAL | FeLo returns from loan to Team Canada. | |
 CAN | FeLo's loan from DAL Empire ends. | |
 HTM | Defrag, Dqvee, Henry, Zer0, and camallenn (Analyst) leave. | |
 BBG | Pandur and Ronin (Coach) leave. | |
| September 1 | ||
| SamLovely & Colors Ashleigh & Xamzah in the BoomTV Code Red Women of Warzone 2021-09-01. | ||
 tR | Team signs roster of Fuze. EvadEr, Legend Juice, Losty, Skill, Skillstho, and MG King (Manager) join. | |
 FUZE | Roster is signed by  Revenge. EvadEr, Legend Juice, Losty, Skill, Skillstho, and MG King (Manager) leave. | |
 LDN | Afro's contract is extended. | |
| TOR | Bance, Cammy, Insight, and Methodz's contracts are extended. | |
| NY | Asim, Clayster, HyDra, and Mack's contracts are extended. | |
| MIN | Attach, MajorManiak, Priestahh, and Standy's contracts are extended. | |
| LAT | Huke's contract is extended. | |
| FLA | Havok, Neptune, Owakening, Skyz, and Yeez's contracts are extended. | |
| DAL | C6, iLLeY, Shotzzy, and Vivid's contracts are extended. | |
| ATL | aBeZy, Arcitys, Cellium, Simp, and Sib's contracts are extended. | |
| LAT | John, SlasheR, and Venom leave. | |
 ELV | Bidz, Denza, Hicksy, Weeman, DREAL (Coach), and JPDigits (Analyst) leave. | |
| MIN | Accuracy leaves. | |
