After completing a three-game sweep of the division-leading Rockies on Sunday, San Francisco trails Colorado by just one game.
The defending World Series champions displayed some familiar trademarks in pulling out the brooms on the Rockies.
Stellar pitching held the Rockies to just six runs in the series, and the Giants -- who won the first two games of the set with walk-off hits -- displayed the same kind of timely offense that proved vital during last season's storybook postseason run.
"I think we're starting to come together," said Giants lefty Madison Bumgarner, who allowed one earned run over six innings but received a no decision on Saturday. "I'm starting to see a lot more intensity and a lot more fire from the guys. It's good."
The Giants played their best all-around series of the season without a contribution from ace Tim Lincecum, who will start on Tuesday when San Francisco opens a three-game set against the D-backs at AT&T Park.
Lincecum is coming off a stellar outing against the Mets, when he struck out 12 and allowed no runs over seven innings. His 57 strikeouts are tied for third-highest total in the Majors.
The D-backs' Tuesday starter Ian Kennedy doesn't send batters back to the dugout with the same frequency, but he has been solid, nonetheless.
The right-hander is 3-1 with a 3.80 ERA this season, and is coming off a solid performance his last time out against the Rockies -- two runs allowed in six innings.
D-backs: Gibson likes Parra's patience
Gerardo Parra's performance at the plate this season -- he is hitting .277 -- and his glove in left field have made him one of the club's most valuable performers. Now, improved patience in the batter's box is making him even more dangerous.
After walking just six times in April, Parra has already drawn six free passes in the seven games the team has played in May.
"That's good to see," manager Kirk Gibson said of Parra's walks. "He's taking the things that we're working on, talking about and utilizing them in the game. It makes him a much better player, more dangerous."
Giants: Ross finding his groove
Cody Ross entered the Giants' series against the Rockies in a funk, but he left it in a zone.
Ross was 3-for-5 in the series, and he delivered all three of the Giants' runs on Sunday. His single in the fourth scored Pat Burrell, and his two-run homer in the sixth off Jorge De La Rosa capped the scoring for the Giants.
The D-backs are the only team in the Major Leagues that haven't been shut out this season. ... The Giants' win in the finale vs. the Rockies was the team's first win on a Sunday this season. They were previously 0-5 in Sunday games.