Tim Lincecum pitched four-hit ball into the seventh inning and Xavier Nady had a three-run double in his first game of the season, helping the NL West-leading San Francisco Giants beat the Cubs 5-2 on Saturday.Lincecum (8-14) allowed two runs on David DeJesus’ seventh homer and struck out seven over 6 1-3 innings in a solid effort on a breezy day at Wrigley Field.Nady, promoted from Triple-A Fresno when major league rosters expanded Saturday, hit a bases-loaded smash past third and into the left-field corner to give San Francisco a 4-0 lead in the first.