Don Mattrick just recently jumped ship from Microsoft Xbox to Zynga and took up the CEO position. According to Bloomberg, Mattrick has apparently been gunning for the top spot at the social gaming company for a while.
A few years ago, Mattrick had been negotiating a Microsoft buyout of Zynga. The idea was to bring social games to Xbox, which were doing rather well on Facebook back in 2010. Unfortunately, according to anonymous sources, these talks never amounted to anything, but Mattrick and Pincus kept a close relationship. It's no doubt part of the reason why Mattrick has made the jump to Zynga. Of course, the $50 million compensation package he's receiving as part of the switch sweetens the deal.
It would have been interesting to see how the situation would have played out should that deal have gone through. Zynga probably would have seen better fortunes. As of late, the company is no longer profitable, its stocks have plummeted, and it was forced to bring down mass layoffs and close many of its offices.