Gideon Yu, the former CFO of Gideon Yu, the former CFO of Facebook who left two years ago to become a partner at Khosla Ventures, is leaving venture capital to become the chief strategy officer of the San Francisco 49ers. "The drama of being a venture capitalist isn’t really for me," he tells me. But he insists, "I am absolutely not leaving tech." Yu will remain on the boards of Square and Meebo, and says he works one day a week at Square. He wants to remain active investing and helping startups, but not as a full-time venture capitalist. One option was to become an affiliate partner, but that didn't work out. Instead, he plans to keep investing his own money as an angel investor. The rumor in Silicon Valley is that he left Facebook with stock worth $500 million. He won't comment on his net worth other than to say that he made more than he ever thought he would.