Greg Street, also known as Ghostcrawler, was the lead systems designer for World of Warcraft for much of the fantasy MMO's life. When he left Blizzard late last year, the rumor mill exploded with speculation on where (and why) one of WoW's most familiar and visible developers might be going. As of today, the mystery appears to be solved.
Information on Street's LinkedIn profile, supported by several industry sources, indicates that he is now working as lead game designer at Riot Games, known for the massively popular League of Legends. Street has yet to confirm the move via Twitter or any other official channel.