CHICAGO -- The only thing more unpredictable at Wrigley Field than the rain Saturday was the Dodgers' bullpen.J.P. Howell allowed four runs in the seventh inning, and Brian Wilson allowed two runs in the eighth, as the Chicago Cubs erased a five-run deficit to beat the Dodgers 8-7.Unheralded outfielder Chris Coghlan went 4 for 4 with two home runs and three RBIs.