Jeffrey Kaplan (alias Tigole) was a Lead Game Designer at Blizzard Entertainment, formerly responsible for world design of World of Warcraft (and subsequent expansions), including "quests, outdoor zones, dungeons, raids etc." On February 12, 2009, Jeff announced that he was leaving WoW to work on Blizzard's other unannounced MMO project. He is now the Lead Game Designer for Overwatch. He seems to enjoy his new job.