The Giants are hoping the D-backs will be the cure for All-Star lefty Madison Bumgarner's recent struggles due to the fact that he has not allowed a run against Arizona in 12 innings this year.
And runs have come at a premium for the Giants lately, as they have been held to one or zero runs in 10 of their last 22 games.
So the Giants are counting on Bumgarner to try to close the first half on a positive note in Sunday's series finale against the D-backs at AT&T Park.
Over his last three starts, Bumgarner is 0-3 with a 7.50 ERA, and he allowed season highs in runs (six) and hits (10) during his last outing against the A's.
Since he is making the start Sunday, Bumgarner will not pitch in the All-Star Game on Tuesday in Minnesota.
The D-backs will start left-hander Vidal Nuno in place of Chase Anderson, who is healthy but the team wants to monitor his innings. Anderson has thrown 93 1/3 innings between Double-A and the Majors this season already, compared to 88 innings with Triple-A Reno last year. He will not make his next start until July 22 against the Tigers, giving him 14 days of rest.
Nuno was impressive in his D-backs debut against the Marlins, tossing seven scoreless innings and striking out seven, but the bullpen could not hold the lead.
"He was great," D-backs manager Kirk Gibson said. "Threw all his pitches, moved the ball around, had great command of the strike zone, knew how to use his pitches."
D-backs: Parra looking forward to All-Star break
Gerardo Parra plans to take the four-day All-Star break to sit back, relax and not think about baseball.
Prior to going 2-for-4 with an RBI on Saturday, Parra was hitting just .140 since June 27.
"I don't feel good at home plate right now, I admit it, but I don't feel frustrated," Parra said before the game. "I'm just working hard every day and I feel like in the second half it will be great. Maybe one or two games getting two base hits and I'll feel better. Mentally, I'm thinking too much. I want a base hit, I want to help us win. Too many things in my mind."
Giants: Panik growing comfortable
Three weeks after his first Major League callup, Joe Panik, the 23-year-old Giants rookie, has gotten to know his teammates better, has a place to stay in the city and has learned his way around the area. As his familiarity and comfort level with the new surroundings have risen, so has his production.
Panik (.220, four RBIs) has hit .265 (9-for-34) in his last 10 games and has developed good chemistry with double-play partner Brandon Crawford.
"The experience of playing in front of 40,000-plus, there's nothing that can teach you or prepare you for that," Panik said. "With anything, it's going to take some time to settle in, and I feel like I've settled in and gotten back to playing the game I normally play."
• The Giants are 37-15 when they hit at least one home run, and 14-28 when they do not.
• San Francisco has won just five of its last 21 home games.
Jamal Collier is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.