Tim Lincecum took the mound with conviction and an especiallycrackling fastball Tuesday night, determined to hold the lineagainst the upstart Arizona Diamondbacks. He wore a much different expression in the seventh inning, as hegrabbed a jacket and slumped down the dugout tunnel. Lincecum made just one mistake, but it was to the wrong hittereven if that hitter was playing in just his second major leaguegame. Paul Goldschmidt pounded a two-run home run into the deepestreaches of the left field bleachers and the Giants ceded sole possession of theNL West lead after a 6-1 loss to the Diamondbacks at AT&TPark.