Logan Webb knows the Giants’ roster construction is out of his hands, but he can’t help but acknowledge the moves other NL West teams have made this offseason.Such as … the reigning and back-to-back World Series champion Los Angeles Dodgers — aka San Francisco’s longtime rivals.After winning the World Series in November, the Dodgers signed two of the top free agents, four-time MLB All-Star Kyle Tucker and three-time MLB All-Star Edwin Díaz, this winter.“It’s not my job to add guys or do anything,” Webb told reporters Saturday at Giants FanFest in San Ramon. “It’s our job to just go out there and try to compete. Obviously, yeah, it’s not fun for me to watch the team that won it and the team that kicked our ass a lot last year go out and get some really good players just to make it more difficult. “But at the end of the day, you just got to play better and be better. Hopefully we do that.”Meanwhile, the Giants, led by president of baseball operations Buster Posey, have focused on pitching depth and minor league additions rather than big offseason splashes. San Francisco signed RHP Tyler Mahle to a...