(SportsNetwork.com) - While Jake Peavy is trying to get acclimated in San Francisco, Jacob deGrom is fitting into New York's rotation just fine.

Peavy makes his second start with the Giants on Saturday night as he squares off against the Mets and their streaking right-hander in the second contest of a four-game series.

San Francisco acquired Peavy from the Boston Red Sox to help push it past Los Angeles for supremacy in the National League West, but Peavy lost to those same Dodgers in his Giants debut on Sunday.

One day after the trade, the right-handed Peavy lasted six innings and was charged with four runs -- three earned -- on six hits and two walks over six innings. He noted after the game he is still trying to get on the same page as catcher Buster Posey.

"It's going to take some time for me and Buster to get to know each other," said Peavy on the Giants' website. "He's tremendous behind the plate. We all know how good he is. The more we're out there together, I'm sure we'll get a better feel."

Peavy was 1-9 with a 4.72 earned run average this season with Boston before the trade and has not won since April 25. However, the 33-year-old is a solid 6-2 lifetime versus the Mets with a 3.28 ERA in 11 starts.

He'll square off against deGrom in the 26-year-old's 15th career start, and deGrom comes in having won four straight outings after beginning his career with only one victory in his first six decisions.

DeGrom has allowed just two runs over 27 1/3 innings during his winning streak and logged 6 1/3 scoreless frames to beat Milwaukee on Sunday. The rookie scattered four hits and two walks while striking out four and did not allow a homer for a ninth straight start.

It was deGrom's shortest outing over his win streak as Milwaukee battled at the plate.

"They were late on the fastball, so I kept going with it," deGrom noted on New York's website. "They just kept fouling it off. I was thinking eventually I'd get one by them. Just keeping a positive mindset out there. It's kind of frustrating when they foul off a bunch of pitches, but I wasn't really leaving any over the middle of the plate for them to get, so that helped out."

Now 5-5 with a 2.79 ERA on the season, deGrom will face the Giants for the first time in what will be his seventh home start. He is 2-3 with a 1.83 ERA at Citi Field.

The Giants won Friday's opener 5-1 behind Ryan Vogelsong's second career complete game. The hurler went the distance for the first time since 2011, but that was a rain-shortened, six-inning outing.

Versus the Mets, the right-hander allowed one run on two hits and a walk to snap a personal five-game losing streak.

Lucas Duda ended Vogelsong's shutout bid with his 20th homer of the season in the eighth.

"What a great game," Giants manager Bruce Bochy said. "Good for (Vogelsong). He's had some tough luck. Really, he did a great job of pounding the strike zone."

Hunter Pence knocked in three runs, while Brandon Crawford had three hits and an RBI in the Giants' second straight winning following a six-game slide. That has the club 2 1/2 games behind the Los Angeles Dodgers for the top spot in the National League West.

Jon Niese was charged with five runs -- three earned -- on nine hits with four strikeouts over eight-plus innings in the setback.

"He has to make big pitches and he didn't make them," New York manager Terry Collins said of Niese. "I thought tonight (San Francisco) did damage when he made a mistake. I thought the quality of pitching was very good tonight."

The Mets, who had won three of four overall coming in, were swept in three games at San Francisco from June 6-8 and have lost six of the previous seven matchups between the two clubs.