Atlanta Braves starting pitcher Randall Delgado throws in the second inning of a baseball game against the San Francisco Giants Tuesday, Aug. 16, 2011, in Atlanta. (AP Photo/John Bazemore)
ATLANTA -- Randall Delgado's second major league start was a lot more impressive than his first two months ago.
In fact, the 21-year-old Braves right-hander was even more dominating than he had been in his two starts with Gwinnett recently.
Delgado faced the minimum 18 batters against defending World Series champion San Francisco before allowing a leadoff homer to Cody Ross in the seventh inning to end the no-hit bid and tie the game.
But four Braves relievers continued to shut down the Giants and the Braves won it in the 11th inning at Turner Field on Martin Prado's two-out hit after a double by Brooks Conrad on Tuesday night.
The dramatic walk-off victory was the second in as many nights for the Braves over the Giants and pushed their lead in the wild-card race two six games.
The Braves, eliminated by the Giants in the postseason a year, swept a three-game series in San Francisco during April and won 5-4 on Monday night when Freddie Freeman's hit completed a three-run rally.
The no-doubt blast by Ross on a 3-and-1 pitch tied the game and Delgado was lifted by Braves manager Fredi Gonzalez despite having thrown only 74 pitches.
"He was impressive," Giants manager Bruce Bochy said. "We couldn't touch him. The kid did a great job."
Delgado, who struck out four and walked one, was promoted from Class AAA to make the start against the Giants because Tommy Hanson had to go on the disabled list with shoulder tendonitis and it was his day to pitch after two dazzling outings with the G-Braves.
Delgado had returned to Class AA after making his major league debut in a spot start against Texas on June 17. He took the loss in that game, giving up seven hits and four runs -- three earned -- in four innings with Josh Hamilton's homer the big blow.
Promoted to Gwinnett after going 5-5 with a 3.84 ERA for Mississippi, Delgado didn't allow a run in two starts for the G-Braves while giving up just six hits over 13 innings and striking out 15.
Mike Fontenot walked with one out in the fourth inning to give the Giants a base runner. But second baseman Dan Uggla went to his left to grab a smash by Pablo Sandoval and shortstop Alex Gonzalez made a leaping turn for a double play.
Delgado needed less than 10 pitches in three of the first six innings. He threw nine in the first and eight each in the third and fifth innings.
The Braves scored a run in the third inning and got Giants starter Jonathan Sanchez out of the game in the process. Sanchez sprained his left ankle fielding a sacrifice bunt by Delgado after Jose Constanza's one-out bunt single and Michael Bourn greeted Giants reliever Guillermo Moto with an RBI hit.
Brian McCann singled in the fourth, but that was the Braves' last hit until Uggla singled leading off the 10th. Freeman followed with another hit, but was caught rounding first base too far and the Giants got out of the jam with a double play after Chipper Jones, dropped to sixth in the order for the first time since 1997, was walked intentionally.