From Liquipedia StarCraft Brood War Wiki
See n.Die_soO for the Zerg player with a similar nick.
Park Jong Soo
May 21, 1988
SoO[S.SiR], CreationToss, Soo_STX
Park "SoO" Jong Soo is a retired StarCraft progamer from South Korea who played Protoss for STX SouL.