Sources tell AllThingsD Zynga (ZNGA) COO David Ko, CTO Cadir Lee, and Chief People Officer (i.e. HR chief) Colleen McCreary "will step down from their positions" as part of a restructuring launched by new CEO Don Mattrick.
A company announcement is expected today.
Over the last year, Zynga has already seen huge layoffs and a C-suite restructuring that yielded a CFO change and Ko's appointment as COO. It has also seen an avalanche of executive departures amidst plunging bookings and a slumping stock price.