- Marathon Game Director Leaves As Player Counts Dwindle Kotaku
- ‘The Mission Will Continue in New and Surprising Ways’ — Marathon Game Director Joseph Ziegler Is Leaving Bungie IGN
- Marathon’s game director is passing the baton. The Verge
- Marathon Game Director Joseph Ziegler Leaves Bungie Insider Gaming
- Marathon’s Game Director Announces Departure From Bungie GamingBolt