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| May 31 | ||
|---|---|---|
 AA | JansportJake joins. | |
 e NovatioN,  Monarch, and TEAM ALPHA JP qualify for CDC Japan National Cup 2020 Summer Qualifier Stage 2. | ||
 O Canada  Toronto Team in the Toronto Ultra Northern Rivals III 2020. | ||
 F/A | Zappy retires. | |
| May 29 | ||
 RBL | OPTIMUM leaves. | |
 ATL | Team partners with Scuf Gaming. | |
 Team WaR Waps got power in the EEG Malta 4.0
. | ||
| May 28 | ||
| Symfuhny & HusKerrs TeePee & MerK in the Twitch Rivals Doritos Disruptor Series. | ||
 TaL | Chaaxter leaves. | |
| May 27 | ||
 VrT | DreeyK joins. | |
 styX | DreeyK leaves. | |
| RBL | Hunt leaves. | |
| RBL | Clamp leaves. | |
| TeamSpeak joins as official broadcast communications partner of league. | ||
 EID | Fusionz, Hawqeh, Henry, Iviano, and LewTee join. | |
 T10 | Iviano leaves. | |
| Hellooo Always Getting BS'd in the GameBattles US Air Force Gunfight 2v2 2020-05-27. | ||
| May 26 | ||
MFAM SuperEvan  Team DougIsRaw in the NICKMERCS MFAM Gauntlet May Main Event. | ||
| RBL | DeeLo leaves. | |
 OBT | Afro, BBConor, Cxllum, Disarray, Hicksy, and Kewe (Coach) join. Braaain, JRezzy, Niall, WarDy, YaKo, and 7omm1 (Coach) leave. | |
| May 25 | ||
| AA | kLoH leaves. | |
 MYTH | Staan (temporary substitute) leaves. | |
 Carnage Gaming PDHM Gold in the National Gaming Events Season 10 Playoffs. | ||
 SNG | Clashy, ERA, Neax, Orgic, SlayeR, and Vncnt join. | |
| May 24 | ||
Diamonddust,  REJECT, and  Fiveness Esports qualify for CDC Japan National Cup 2020 Summer Qualifier Stage 2. | ||
 AF Academy Kentucky Fire in the CDC Seattle Open 2020 North America. | ||
 Chicago Huntsmen  London Royal Ravens in the Call of Duty League 2020 Week 8 - Seattle. | ||
| Waps got power Team WaR in the CDC Seattle Open 2020 Europe. | ||
 Paris Legion  Florida Mutineers in the CDL Warzone Weekend: Week 1. | ||
 Renegades  Mindfreak in the CDC Seattle Open 2020 Asia Pacific. | ||
| May 23 (approx.) | ||
| styX | Jouziin joins. | |
 NVG | Jouziin leaves. | |
| May 23 | ||
| RBL | DeeLo rejoins. | |
| May 22 (approx.) | ||
 GETB | PaulEhx joins. Pentagrxm leaves. | |
| May 22 | ||
 RUSH | Nicochan leaves. | |
| TaL | Aroma, Chaaxter, and Grad join. | |
 FLA | Owakening joins. Maux moves to substitute. | |
| May 21 | ||
 BBG | Ronin (Coach) joins. | |
 4LF4 | ShadizT joins. Couti leaves. | |
 ACE1 | ShadizT leaves. | |
| May 20 | ||
 EFY | Divvxll, Izaac, JordJP, Toki, and VitxLL join. | |
 TSU | CharlieCuthbert, Izaac, Melvvyn, Toki, VitxLL, and dingfat (Coach) leave. | |
 777 | Sadderz and Sqechy leave. | |
| VrT | Cllyne, Doty, and Sheed join. | |
 ELI | Aroma, Divinity, Myki, Vision, and YellowBeanBag leave. | |
 UYU | Parasite joins. Infamous leaves. | |
 LDN | Zer0 joins. Jurd moves to substitute. | |
 NY | Zer0 leaves. | |
| Humidititties OldBO4Premium in the GameBattles US Air Force Gunfight #4 2020-05-20. | ||
| May 19 | ||
| MYTH | Beans, C0bra, HypnoJG, Midgxt, and Willsane join. Staan joins as temporary substitute for CDC Seattle Open 2020 Europe, replacing C0bra. | |
 MIN | TTinyy returns from loan to Rebel Esports. | |
| RBL | TTinyy's loan from MIN RØKKR ends. | |
| Call of Duty League 2020 Playoffs prizepool announced as $4,600,000. All twelve teams will attend. | ||
| May 18 (approx.) | ||
| BBG | Groovy joins. | |
| May 18 | ||
 GoG | Resingz joins. | |
 Th3X | CocoLander, eXemptty, Paradise, Rafa, and Rangel join. | |
| F/A | CocoLander comes out of retirement. | |
 CHI | Prestinni joins. General moves to substitute. | |
| FLA | Prestinni leaves. | |
| May 17 | ||
| GoG | Astro, DareH, Dreath, Setzzy, and Thazzey join. | |
 Shorys Gaming  Skull Cracker in the Latam Norte League 2020. | ||
 Triumph 2011Bruins in the CDC Challengers Cup #3 North America. | ||
Team WaR  TrainHard Esport in the CDC Challengers Cup #3 Europe. | ||
| Renegades Throne in the CDC Challengers Cup #3 Asia Pacific. | ||
| May 16 | ||
| RBL | Hunt joins. | |
 Texas A&M University Maroon  Concord University in the College CoD 2020 Playoffs. | ||
 TH | Genesis joins. | |
| ELI | Divinity, Myki, Vision, and YellowBeanBag join. Aroma rejoins. Cxllum, Genesis, Hawqeh, and Hicksy leave. | |
 MH | Divinity, Myki, Vision, and YellowBeanBag leave. | |
 QLS | Biso, Blade, Diixblo, Predax, and Wartex rejoin. | |
 RVNS | Torress leaves. | |
 MF | Lymax joins. Beastn leaves. | |
| AA | JuJu joins. | |
 PDHM | Cxnspiracy, FLawLesS, Infinit, Mind, and Ulisses join. | |
| May 15 | ||
| NVG | Jouziin and Nuker join. | |
 TS | Blueice, Jingo, Nova, siuL, Tynxii, Vitaly, and Shadow (Team Manager) join. | |
 PRY | AlkaZah, Astatix, Bondy, Faisal, and Imagine join. | |
| May 13 | ||
| VrT | DScoTz and Strict join. | |
| ELI | Aroma leaves. | |
| Vikkstar123 & WarsZ Aydan & Crimsix in the Warzone Wednesday: Week 8. | ||
| Scar & Unknown Eat My Skeet in the GameBattles US Air Force Gunfight 2v2 2020-05-13. | ||
| May 12 | ||
| F/A | LuKinas retires. | |
| styX | DreeyK joins. | |
 SEA | Enable moves to starting roster. Pandur moves to substitute. | |
| CHI | Team is sponsored by Popeyes. | |
| TH | Defrag leaves. | |
 RiFt | Middoh and Tyson join. BuZZO and Jazhn leave. | |
 AE M | Middoh leaves. | |
| OBT | YaKo joins. Fusionz leaves. | |
| May 12 (approx.) | ||
| AE M | Benjy, Hybrid, Ryee, and Zoox leave. | |
| May 11 | ||
| 777 | Morder, Reasson, Sadderz, Sqechy, and VenTs join. | |
 OGLA | Pacman (Head Coach) leaves. | |
 OG | Rallied (Content Creator) leaves. | |
| TaL | envdiaN, YaKo, and Zappy leave. | |
 VOLT | Abuzah joins. XenoN leaves. | |
| May 10 | ||
| F/A | Edu renames to Getway. | |
| RBL | DraMa leaves. | |
Atlanta FaZe  OpTic Gaming Los Angeles in the Call of Duty League 2020 Week 7 - Florida. | ||
| Triumph WestR 2.0 in the CDC Florida Open 2020 North America. | ||
| El Jefa TrainHard Esport in the CDC Florida Open 2020 Europe. | ||
| Renegades Mindfreak in the CDC Florida Open 2020 Asia Pacific. | ||
 Libalent Vertex  SCARZ in the CDC Japan National Cup 2020 Spring Finals. | ||
| May 9 | ||
 SRP | Sarun joins. | |
 NexT | Edu retires. | |
| NexT | Crawly retires. | |
| NexT | Cllyne, DreeyK, LuKinas, and Horid (Coach) leave. | |
 COW | Billy joins. Chunk leaves. | |
| OBT | Fusionz joins. Wartex leaves. | |
| UYU | Infamous joins. PaulEhx leaves. | |
| VOLT | XenoN joins. Nadox leaves. | |
| May 8 | ||
 Pushing Gaming  Team Paragon FTW in the #LaFranquiciaCUP 2020. | ||
 EvL | Fenix and NanZ join. | |
| T10 | Rafi leaves. | |
| MH | YellowBeanBag joins. Hectic leaves. | |
| May 7 | ||
| T10 | Furiious leaves. | |
 CF | Dirty, Faake, Nuclear, Stukas, and STYL3 join. | |
| EvL | Strict leaves. | |
 FTW | FlasH joins. Visions leaves. | |
 TPF | FlasH joins. Visions leaves. | |
| T10 | Grad leaves. | |
| AF Academy Carnage Gaming in the Florida Mutineers Kraken Bounty #2. | ||
| AA | Boards leaves. | |
| May 6 | ||
| BBG | MohaK leaves. | |
| Vikkstar123 & Itz WarsZ Aydan & TeePee in the Warzone Wednesday: Week 7. | ||
| AE M | Middoh joins. Billazor leaves. | |
| Take one The-850 in the GameBattles US Air Force Gunfight 2v2 2020-05-06. | ||
 CLT | dekk0s, LuNaTiC, Sawcer, Spekcy, and Staind join. | |
 PSH | Sukry rejoins as temporary substitute for NGL Masters Division 2020 Stage 2. | |
| SNG | Gismo joins. Chain moves to substitute. | |
 ETR | Dani, Drumpz, Fussion, and RoGGeR join. ASA moves to substitute. BuRRn and Hyzzn leave. | |
| May 5 | ||
 UHY | ShuKz (Streamer) joins. | |
| NVG | Dante, Lorosco, Martino, Mirolla, and OMGui join. | |
 PrB | Mirolla leaves. | |
| May 4 | ||
| ACE1 | Draken joins. Supreeme leaves. | |
 AK | Supreeme joins. Draken leaves. | |
 CriM | Robeerz joins. iPulse leaves. | |
| OGLA | Chino moves to starting roster. JKap moves to substitute. | |
| FLA | Team partners with Destined 2 Dominate. | |
| RVNS | Felon, PuNi, ReskiA, SupeR, and Miti (Manager) join. Drumpz, Fussion, Pepitas, and Superpollo leave. | |
| CHI | General moves to starting roster. Gunless moves to substitute. | |
| May 4 (approx.) | ||
| Th3X | Doty, Feezin, Jouziin, Sheed, and Soldier leave. | |
| May 3 | ||
 OE | Axrith, Bnates, Clout, Decipher, Dropz, Leon, Miney, and Time join. | |
Team ShivFPS  Team HusKerrs in the Syndicate Sundays 2020 Grand Final. | ||
 Sixth Gear BR  NexT Team in the ArenaOn Série A 2020 Season 1 Playoffs. | ||
Yesssirrr  WestR in the GameBattles Premium $1000 4v4 S&D 2020-05-03. | ||
| WestR 2.0 GetBusy in the CDC Challengers Cup #2 North America. | ||
Team WaR  Team Singularity in the CDC Challengers Cup #2 Europe. | ||
| Renegades Mindfreak in the CDC Challengers Cup #2 Asia Pacific. | ||
| May 2 | ||
| RBL | Clamp, DraMa, and Optimum join. Exceed and TTinyy are loaned from MIN RØKKR. | |
| MIN | Exceed and TTinyy are loaned to Rebel Esports. | |
| May 1 (approx.) | ||
 DVT | Chord, Incendio, and Wildrilla join. 6IX, Ice, and Psycho leave. | |
 mYm | Broszxs joins. | |
| May 1 | ||
 Obtained Esports  Socially eSports in the EEG European League 2020 Season 2 Championship Playoffs. | ||
 Unjustified Gaming  Athaim Gaming in the Toronto Ultra Northern Rivals II. | ||
| SNG | Fenix (Coach) joins. | |
| TaL | Fenix (Coach) leaves. | |