By Jeremy Kahn

PITTSBURGH-What a first impression for Marlon Byrd in his first game for the San Francisco Giants.

Byrd hit a two-run home run in the top of the first inning, and added a single and then a double and the Giants evened up the series with a 6-4 victory over the Pittsburgh Pirates before a sellout crowd of 37,693 at PNC Park.

“Swing felt pretty good, just one of those days where even when he’s throwing a good pitch, you’re fouling them off and you keep battling and battling and finally get a pitch you can drive,” said Byrd.

Not to be out done at the plate, Madison Bumgarner hit his second home run of the week in the top of the second inning and his fifth of the season.

After a tough start on the mound, where he allowed two runs in the first two innings and then regrouped to pickup his 15th win of the season.

“Command wasn’t as good as we would prefer it was certainly good enough to compete and kind of make pitches,” said Bumgarner.

In 6.1 innings of work, Bumgarner gave up three runs on six hits, walking one and striking out six before giving way to the Giants bullpen.

Sergio Romo came on to replace Bumgarner, and threw 1.1 innings, allowing one run and striking out one.

In what was probably the biggest out of the game came from Josh Osich, as he got Starling Marte to groundout to Brandon Crawford to end the eighth inning.

“Definitely we needed this game, a big team effort, feel great, kind of privileged to pitch for this team in those situations,” said Osich.

Santiago Casilla regrouped after allowing a leadoff walk to Neil Walker, as he got Gregory Polanco to ground into a double play and then got Marte to groundout to Brandon Crawford to end the game.

Prior to the game, Chris Heston was optioned to the Triple-A Sacramento Rivercats.

“Give him a little break, he’ll get 10 days and be back on the 31 and for the day will make a move,” said Bruce Bochy.

In place of Heston, who was slated to in Saturday’s game, Mike Leake will start against Gerrit Cole.

This was the first time this season that the Giants have defeated the Pirates, as their season record stands at 1-4.

With the loss, the Pirates are now 17-4 against the National League West and are 9-2 against the West at PNC Park.