The long ball has not been very kind to Giants right-hander Ryan Vogelsong so far this season.
Vogelsong has allowed an average of one home run roughly every six innings this season. In comparison, he permitted just one home run every 12 innings in his previous two seasons.
That was the right-hander's undoing in his last start against the D-backs, allowing solo home runs to Eric Chavez and pitcher Wade Miley. In all, Vogelsong surrendered four runs on seven hits in seven innings of work for the no-decision.
To put such numbers into perspective, he gave up two or more home runs only one time in 31 starts last season.
Vogelsong will look to limit the deep ball Sunday as the Giants try to salvage a game against the Padres in the finale of a three-game set at Petco Park.
Meanwhile, Padres right-hander Jason Marquis will look to rebound after his worst start of the season Monday against the Brewers.
In his shortest outing of the young season, the left-hander struggled from the get-go, allowing two first-inning home runs and hitting back-to-back batters.
"I just don't feel comfortable on the mound," Marquis said after the contest. "My fastball command is not where I want it to be. The slider is there, but there are only so many times you can go to that. It all starts with my fastball command and getting my sinker down in the zone, and I really haven't been doing that."
In total, Marquis tossed 4 2/3 innings, allowing seven runs on four hits. He also walked four in the start to fall to 1-2 on the season with a 4.63 ERA.
Giants: Affeldt could return after another bullpen session
Reliever Jeremy Affeldt threw 30 pitches in the bullpen Saturday, marking the first time he had worked off a mound since straining his right side April 14.
Giants manager Bruce Bochy said Affeldt will have another bullpen session during the Giants' upcoming series in Arizona and after that workout, they will decide whether to reinstate Affeldt or have him pitch a simulated game. Affeldt is eligible to rejoin the active roster Tuesday.
Bochy said the decision regarding Affeldt will depend on not only how he throws but also what is going on with the bullpen at the time.
Padres: Xolos, Club America to play match at Petco Park
The Padres announced Saturday that Petco Park will host an exhibition soccer match featuring the Xolos de Tijuana on July 6 at 7:30 p.m. PT. The non-league match will pit the Xolos against Club America in the 2013 San Diego Clasico.
Several Padres players along with broadcaster Eduardo Ortega made the announcement near home plate prior to Saturday's contest against San Francisco. Xolos players, including San Diego native Joe Corona, were also present as first baseman Yonder Alonso and Corona exchanged jerseys as a symbol of the partnership between the Padres and Xolos.
"To get to play in my hometown in front of my family and a lot of supporters and where I grew up is very special thing," Corona said. "Not only for us, but for the Xolos and the partnership that we have with the Padres. It will be a pleasure to play at Petco Park."
• Giants outfielder Hunter Pence has a career .423 average (11-for-26) against Marquis with one home run.
Quinn Roberts is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.