Photo credit: @NBCSAthletics

By Jeremy Kahn

SAN FRANCISCO — Mark Canha changed the outcome of game two of the Bay Bridge Series with one swing of the bat.

Canha smashed a two-run pinch hit home run off of Tony Watson in the top of the seventh inning, as the Oakland A’s came back to defeat the San Francisco Giants 5-4 before a sellout crowd of 41,970 at AT&T Park on Saturday night. It was the first pinch hit home run for Canha in his Major League career.

It was a tough game for Watson, who was usually lights out for the Giants, as he gave up a leadoff single to Josh Phegley, and then Canha put a Watson offering half way up the left field bleachers to give the A’s the lead for good.

Buster Posey continues his well against the A’s, as he picked up two hits in his first two at-bats on the night. This is the 11th time in his last 16 games against the A’s that has had multi-hit games against the A’s, during the stretch, Posey is 29-for-67 with a batting average of .433.

Chase d’Arnaud picked up two more hits for the Giants, and is batting .294 since being called up from Sacramento.

Giants starter Jeff Samardzija went just four innings, allowing two runs on three hits, walking two and striking out one, as he did not fare in the decision.

It was a tough night for A’s starter Brett Anderson, as he did not make out of the fourth inning, as he went 3.1 innings, allowing three runs on six hits, not walking a batter and striking out one.

Anderson picked up his eighth career hit in the top of the second inning, and first since April 24, 2017, while a member of the Chicago Cubs against the Pittsburgh Pirates in a 14-3 victory for the Cubs at PNC Park.

The A’s took an early 1-0 lead on Samardzija in the top of the second inning, as Matt Chapman walked and then scored on a Phegley sacrifice fly.

That would be the score for a half inning, as Steven Duggar led off the inning with a double, then scored on a Alen Hanson.

Khris Davis then gave the A’s their second lead of the night, as he hit a sacrifice fly that scored Stephen Piscotty, who led off the inning with a double off of Samardzija.

Duggar continued his hot hitting, as he double in the bottom of the fourth inning to score Hernandez, who doubled just before Duggar.

Over his last two games, Duggar has four doubles against A’s pitching and is hitting .320 since being recalled from Triple-A Sacramento.

Two batters later, Austin Slater gave the Giants the lead once again, as he singled in Duggar from second base.

“d’Arnaud and Duggar had great games tonight,” said manager Bruce Bochy.

Derek Holland came on to replace Samardzija, and he did an outstanding job, as he struck out the first five batters he faced, but then gave up a long single to Chad Pinder off of Levi’s Landing in right field. Holland then regrouped to get Dustin Fowler to ground into a force play to end the threat.

Holland is the eighth National League pitcher this season to strikeout five or more in two innings.

Watson lasted just 0.1 innings, allowing two runs on three hits, walking one and striking out one, as he lost for the third time this season against two wins.

Rookie Ray Black came on to replace Watson, and he responded by striking out Davis and Chapman to end the inning.

Brandon Belt was ejected from the game in the between the fifth and sixth innings by third base umpire Greg Gibson for arguing a third strike call. Belt was ejected after he struck out in the bottom of the fifth inning on a check swing.

“I have not looked at it to be honest,” said Bochy.

The Giants put the winning run on first base, as Andrew McCutchen and Posey each walked with two outs off of A’s closer Blake Treinen, but Treinen was able to strikeout Crawford to end the game.

Crawford was intentionally walked in the bottom of the seventh inning by A’s reliever Leo Trivino, and it was the 11thintentional walk of the season for Crawford, a new career high and the second most in the National League.

NOTES: With the Giants and A’s playing in six straight games prior to and after the All-Star break, this is the first time since July 3-6, 1969 against the Atlanta Braves that the Giants have played the same opponent in six straight games. Both July 4 and July 6 were doubleheaders against the Braves, this according to Stats, LLC.

On this day in 2005, the Giants defeated the Los Angeles Dodgers 4-3, and the Giants became the first team in major league history to win 10,000 games. The Giants, who were founded as the Gothams in 1883 were 10,000-8511 after their win over their longtime rivals.

UP NEXT: The Giants and A’s will battle it out in Sunday afternoon’s rubber game at 1:05 pm PDT.

Giants rookie Andrew Suarez will close out the first half, as he looks for his fourth win of the season. The A’s will send eight-game winner Sean Manaea to the mound.