E—Spor Ö ile başlayan takımlar
- Olivieri, Genaro Alberto
- Olimpia Asuncion
- Orsomarso
- Orbit Anoynmo
- Orlando Magic (blaylockk)
- Oklahoma City Thunder (panteraxball)
- Oklahoma City Thunder (Revenant)
- Oklahoma City Thunder (yammyloon)
- Oklahoma City Thunder (Pakapaka)
- Oh My God.A
- Osaka, Naomi
- Önnereds HK
- OmarLovers
- O'Connell, Christopher
- Omg Youth
- Orgless Latam
- Odium
- Osaka
- OFFSYDE Esports
- OGC Nice
- Olympique Lyon (Denver)
- OGC Nice (Oslo)
- Olympique de Marseille (Jadon)
- Olympique de Marseille (Bastony)
- OGC Nice (Apo)
- Olympique Lyon (Niskanen15)
- OGC Nice (Holis)
- Olympique de Marseille (Jacob17)
- Olympique Lyon (Travor567)
- Odra Opole
- One Knoxville SC
- Olimpia SP U20
- Oeste-SP U20