Call of Duty franchise, Robert Bowling, has resigned from Infinity Ward and Activision today. Robert "FourZeroTwo" Bowling, who served as creative strategist for Call of Duty and lead at Infinity Ward, just announced his resignation via Twitter. He has yet to announce where he is going next.
Bowling stayed on at Infinity Ward following the mass exodus of staff who would go on to form Respawn Entertainment in 2010.
Update: Here's Activision's official comment on the news: "We sincerely thank Robert for his many years of service. He's been a trusted and valued member of the Infinity Ward team. We wish him all the best on his decision to pursue future opportunities."