With right-hander Matt Cain landing on the 15-day disabled list Sunday, the Giants are reconfiguring their plans for the series opener in Pittsburgh on Monday.
Cain was scratched from his scheduled start against San Diego last Tuesday when he cut the tip of his right index finger while trying to make a sandwich.
Yusmeiro Petit, who threw six shutout innings starting for Cain last week, will start. Right-hander Jake Dunning, who made one start at Triple-A Fresno, will be recalled to fill Cain's spot on the active roster.
The Giants will be facing a Pirates lineup that has scored a combined 21 runs in its past four games. But the San Francisco lineup has a great deal of power backing up whoever gets the nod.
The Giants have homered in 11 straight games and combined for seven in their three-game sweep of Atlanta over the weekend. San Francisco's 41 home runs rank second in the Majors.
"The power this year has been really nice," left-hander Madison Bumgarner said Sunday. "We haven't had a whole lot of it in the past. It lets you know that your lineup's dangerous. It puts a lot of pressure on the other pitcher and the other team."
As Jeff Locke starts for the Pirates in place of injured left-hander Wandy Rodriguez (right knee inflammation), something has got to give when it comes to the Giants' home runs. In 30 starts last season, Locke gave up only 0.6 homers per nine innings.
Locke's return to the rotation allows him the chance to regain the All-Star form he achieved early last season before he was ultimately removed from the rotation and left off Pittsburgh's postseason roster.
"He's certainly had his share [of challenges] since the second half of last season," Pirates manager Clint Hurdle said. "This is a great opportunity for him to embrace what he has and to keep focused on where he wants to go, and how to get there."
Giants: Pagan thriving in daylight
San Francisco center fielder Angel Pagan will be sad to see the sun go down ahead of Monday night's game at PNC Park. He finished 2-for-5 on Sunday, improving his batting clip in day games to .333 (14-for-42) with six extra-base hits and 10 RBIs.
• The Giants' streak of 10 consecutive solo home runs came to an end on Sunday when Brandon Crawford hit a two-run shot in the eighth inning against Braves reliever Jordan Walden. San Francisco falls well short of the franchise record of 21 straight solo home runs set in 2011. It is also the Major League record.
• Crawford homered twice on Sunday for his first career multi-homer game.
Pirates: Marte's short hitting streak ends
Left fielder Starling Marte saw his hitting streak since moving down in the batting order come to a halt at four games on Sunday, when he finished 0-for-4 in a loss to the Blue Jays. He batted .471 (8-for-17) during the short span.
Marte had hit .229 (24-for-105) with nine walks and 37 strikeouts in 26 games that included 24 starts in the leadoff spot. Since Hurdle bumped him down to seventh for two games, sixth for the next two and fifth on Sunday, he has hit .381 (8-for-21).
Meanwhile, Josh Harrison is 4-for-9 with a double, two triples and four runs scored in back-to-back starts batting atop Pittsburgh's lineup.
• The Giants are 15-1 in games in which they score first.
• The Pirates are 7-3 in series openers, including 5-0 at home. Pittsburgh is 4-4-2 in series this season.
Joe Morgan is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.