(SportsNetwork.com) - James Shields attempts to bounce back from his first loss of the season on Thursday afternoon as the San Diego Padres play the rubber match of a three-game set with the San Francisco Giants.
Shields went 7-0 through his first 14 outings with the Padres before getting dealt a 4-2 setback in Arizona on Friday. The right-hander gave up all four runs on eight hits and a season-high four walks, adding five strikeouts. His earned run average moved to 3.75.
The 33-year-old Shields has allowed only one run and seven hits over 16 innings in winning his first two career starts against San Francisco. That includes a home victory on April 11 when he allowed three hits -- one a solo homer to Joaquin Arias in the fourth -- over seven innings with seven strikeouts.
Right-hander Chris Heston gets the start for the Giants having split two starts since his no-hitter against the New York Mets on June 9.
Heston followed up with a 4-0 loss to Arizona, charged with three runs -- two earned -- on seven hits and four walks over five innings. He struck out another six batters after fanning 11 a start earlier against the Mets.
The righty then beat the Los Angeles Dodgers on Friday, though he lasted only 5 2/3 innings. Heston yielded three runs on seven hits, striking out one without a walk to move to 7-5 on the year with a 3.83 ERA.
Heston was hammered for five runs and 11 hits over five frames of a home loss to San Diego on May 6 and is 0-1 with an 8.00 ERA in two starts against the club.
After losing Tuesday's opener in 11 innings, the Giants rebounded to blank the Padres 6-0 last night. Buster Posey hit a grand slam and Ryan Vogelsong scattered five hits over six scoreless innings.
Catcher Andrew Susac had two hits and scored a pair of runs as San Francisco won for the fourth time in six games.
"Great game by Susac," Giants manager Bruce Bochy said. "Called a shutout ... I thought every at-bat was pretty good."
Ian Kennedy allowed six runs on five hits and four walks with six strikeouts for San Diego, which has dropped seven of its last 10 games. The five runs charged to Kennedy in the third inning were all unearned thanks to Will Middlebrooks' error to open the frame.
Joe Panik plated the first run of the inning with a sac fly for the second out and Posey followed Matt Duffy's walk with his fourth career grand slam and second in five games.
"If you didn't give them those extra outs it's a different game," Padres interim manager Patrick Murphy said of the error.
The Padres are 5-4 against the Giants this season, losing two of three in San Francisco in early May.