GLENDALE, Ariz. -- Roberto Pena's two-out single to left-center field scored two runs and gave the White Sox a come-from-behind 4-3 victory over the Giants on Sunday at Camelback Ranch. Pena's hit came off reliever Steven Okert.
Ty Blach, a leading contender for the Giants' fifth starter's spot, allowed two runs over six innings, allowing seven hits with a walk and a strikeout.
"He was awesome, pounding the zone," Giants catcher Tim Federowicz said. "He did a great job of keeping the ball inside, not really giving in."
James Shields, who already has locked down the second spot in the White Sox rotation, yielded three runs on eight hits over his five innings pitched. The right-hander struck out two and walked three.
San Francisco scored all three of its runs in the second inning. Federowicz, who has had a good spring, singled home a run and Eduardo Nunez doubled home two. The White Sox scored two in the fifth on Geovany Soto's double and Peter Bourjos' RBI groundout.

"I mean, they battled me out there," Shields said. "They had a bunch of foul-offs today, and the second inning was my bad inning. I was up in the zone a little bit and they were taking advantage of it.
"Overall it wasn't too bad. They got my pitch count up. I think I had a couple of batters where there were 10-plus pitches. But overall I felt good, and I'm ready to move on."

Giants Up Next:Madison Bumgarner will make his final exhibition tuneup Monday against Cincinnati at Scottsdale, six days before he makes the Giants' season-opening start Sunday at Arizona. Game time vs. the Reds is 1:05 p.m. PT, and it will be the Giants' final home game of the Cactus League season. Bumgarner has not allowed an earned run in his past three starts, spanning 12 innings.
White Sox Up Next: The White Sox play their second-to-last 2017 Cactus League game at Camelback Ranch, only they will be the visiting team in this contest against the Dodgers, with a 3:05 p.m. CT first pitch Monday on MLB.TV. Left-hander Derek Holland gets the start for the White Sox.
Watch every out-of-market regular-season game live on MLB.TV.