The big question coming into the season for the Giants was whether their offense was improved enough to give their pitching enough support to win more games.Well, the offense has been fine, scoring at least four runs in each of the first three games.Sunday, the Giants scored six times. And led 6-0. And lost 7-6. They're 0-3 for the first time since 1984. One more loss, and they'd be 0-4 for the first time since 1950. Can't blame the offense. So blame the pitching and defense. Two seventh-inning errors, by shortstop Brandon Crawford and catcher Buster Posey, led to two runs, enabling the Diamondbacks to take the lead. The Giants scored the NL's fewest runs last year and posted the majors' worst average with runners in scoring position,...