The Giants mustered five hits and a base on balls with Alen Hanson smacking a two run bomb in the first while Gregor Polanco connected on his first long ball I n the opening frame. San Francisco led 3-0 after two innings but everything went south from there with starter Ty Blach allowing five runs on seven hits over 4.1 frames to absorb the loss. It is Andrew McCutchen's first time back in Pittsburgh since he became a Giant. Bell moved to third on a Dickerson groundout.
With the bases loaded and Mercer at the plate, Watson wanted to attack his former teammate on the inside corner, but delivered a fastball too far inside that ultimately plated the winning run.
San Francisco batted around in the fifth. In the first game of the series he gave up a three-run home run, and in the second game he gave up another earned run.
Pittsburgh's ability to cash in against Watson crushed a Giants squad that scored a run in the seventh and one more in the eighth to tie the game 5-5.
Things were a bit more muted 24 hours later, thanks in part to a 93-minute rain delay that left most of the crowd hiding under ponchos for protection from an intermittent downpour.
The outfielder did just that on Friday. The Pirates are 8-2 in Interleague play.
The Pirates entered Saturday fourth in the NL in homers with 46 in 39 games - for basis of comparison it wasn't until their 51st game last season that the Pirates reached 48 homers.
The Pirates assured themselves of their ninth series win of the season. Cervelli drove Samardzija's 98th pitch over the fence in center to put Pittsburgh in front. Falling behind early has crushed the Giants on their road trip, as the club has given up at least one first inning run in seven of their nine games.
Giants: OF Hunter Pence (sprained right thumb) began a rehab assignment at Triple-A Sacramento. The three-run blast was the fifth hit by the Giants this season after the club hit just seven all of a year ago. He exited after three innings on Friday due to a laceration on his right ring finger.
On the first pitch of Rodriguez's outing, catcher Nick Hundley slugged a three-run home run into the left field corner to break open the game and push the Giants ahead 5-0.
21-45 in their last 66 road games against a right-handed starter.
The Pittsburgh hitters have produced 5.0 runs per contest, including 4.9 per game over its last 10 games and 6.8 per game over their last five.