Dave Kosak is a former Blizzard employee, member of Team 5, and Lead Mission Designer for Hearthstone. He was previously the Lead Narrative Designer for World of Warcraft, but joined the Hearthstone team in November 2016.
- Kosak is responsible for the character of Patches the Pirate, created during a "brainstorming session" between the Hearthstone team and the World of Warcraft story team, prior to Kosak's joining Team 5.
- According to his World of Warcraft profile, prior to joining Blizzard, Kosak was "a co-founder and original creative director of GameSpy and the creator of the popular Flintlocke’s Guide to Azeroth and Flintlocke vs. The Horde webcomics".
- The first epic weapon Kosak ever obtained in World of Warcraft was Sul'thraze the Lasher. As a result, he was particularly excited to see Sul'thraze make its way into Hearthstone with the Rastakhan's Rumble expansion.
- November 2015: Joined Team 5.
- October 2020: Left Blizzard Entertainment to work on Deviation Games.
- Hearthside Chat with Dave Kosak: Knights of the Frozen Throne Missions - YouTube. (2017-07-27). Retrieved on 2017-07-27.
- Dave Kosak on Twitter. (2016-11-29).
- TAC Hearthstone BlizzCon 2016 Interview with Rachelle Davis and Peter Whalen. (2016-11-15).
- PC Gamer - The two-year making of Hearthstone’s Patches the Pirate. (2016-12-15).
- Dave Kosak on Twitter. (2016-12-16).
- Dave Kosak on Twitter. (2018-11-02).
- Zadina (2018-11-03). Interview with Dave Kosak and Hadidjah Chamberlin on Rastakhan's Rumble & More - Icy Veins Forums. Retrieved on 2018-11-12.