By Tzvi Machlin We can’t expect MLB umpires to be perfect as accurate as computers when it comes to the strike zone. But one umpire is getting crushed for the litany of wrong calls made in a game yesterday. During Saturday’s game between the Chicago Cubs and St. Louis Cardinals, umpire Bruce Dreckman was behind the plate. And his performance left a lot to be desired. Metrics from UmpScorecards.com indicate that he was way off the mark with some of his ball and strike calls. 11 of 119 called balls were true strikes, while eight of 49 called strikes were true balls. He was accurate on just 89-pe…