Molina struggles in save situation against Giants

Gives up two runs in ninth inning; Flowers collects two hits

SCOTTSDALE, Ariz. -- The San Francisco Giants rallied for two runs in the ninth inning off White Sox reliever Nestor Molina to pull out a 4-3 victory at Scottsdale Stadium on Wednesday.

After Hector Sanchez led off the final frame with a single, Nick Noonan doubled home pinch-runner Juan Perez with the tying run. Brandon Hicks' sacrifice bunt moved Noonan to third before Joaquin Arias delivered a walk-off RBI single.

Alejandro De Aza opened the Chicago White Sox scoring in the fifth inning and scored the go-ahead run two innings later to give the White Sox a 3-2 lead.

With the score tied, 2-2, De Aza christened the seventh inning by reaching base on reliever Yusmeiro Petit's throwing error. De Aza stole second base and sped home on Tyler Flowers' single.

The Giants began the scoring with a pair of first-inning runs off White Sox starter Felipe Paulino. Gregor Blanco singled and scored on Michael Morse's double. Buster Posey collected his fifth RBI in two games with a bloop single to right field that sent Morse home.

"Yeah, he had a nice little sharp curveball, offspeed stuff that he started mixing better as the game went along," White Sox manager Robin Ventura said of Paulino. "Besides the first inning, he pitched well."

Giants starter Tim Lincecum blanked the White Sox on one hit through four innings before Chicago pulled even. Dayan Viciedo doubled leading off the fifth, and scored on De Aza's single. After Flowers' single advanced De Aza to third base, Leury Garcia's bunt single off reliever Dan Runzler delivered the tying run. Adam Eaton's single loaded the bases, but Runzler slipped called third strikes past Gordon Beckham and Jose Abreu to end the threat.

Up next: Jose Quintana has recovered sufficiently from a contusion after taking a Gerardo Parra line drive off of his left shin Saturday to make his normal start Thursday in Tempe against the Angels, with a first pitch time of 3:05 p.m. CT, live on MLB.TV. The goal for Quintana, who only faced two batters Saturday, is to work four innings and/or 60 pitches. Ronald Belisario is expected to make Cactus League debut in relief.

Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. This story was not subject to the approval of Major League Baseball or its clubs.