An ex Wall Street trader improved on "Moneyball" s famed sabermetrics to place bets that would beat the Vegas odds on Major League Baseball games with a 41 percent return in his first year. "Trading Bases" explains how he did it. After the fall of Lehman Brothers, Joe Peta was out of a job. He found a new one but lost that, too, when an ambulance mowed him down. In search of a way to cheer himself up while he recuperated in a wheelchair, Peta started...