SAN FRANCISCO -- Gregor Blanco delivered the biggest hit of the night Thursday, but the description of it remains a mystery.

A bunt single that should have been a sacrifice? A sacrifice that somehow became a single?

Call it unintentionally effective.

Blanco's seventh-inning roller hugged the third-base line and came to rest in fair territory as three Detroit Tigers stood around it in disbelief. It loaded the bases in a scoreless game, and Brandon Crawford followed with a double-play grounder that scored Hunter Pence for the only run the Giants needed in a 2-0 Game 2 victory at AT&T Park.

"That was unbelievable," Blanco said afterward. "As soon as I bunted, I was like, 'Oh my God, it's gonna go foul.' And then the ball just stayed there."

It was more proof that the Giants are leading a charmed postseason life.

They twice have been helped by a baseball randomly striking a base. Angel Pagan's double in Game 1 ricocheted off third base to avoid the Tigers' grasp. In the National League Championship Series, Cardinals pitcher Lance Lynn fired an errant throw to second base that hit the bag and aided a Giants' rally.

"For sure," Blanco said when asked if things are simply going the Giants' way. "That's why baseball is so hard. This game is about having luck. You can hit a line drive 10 times to center field and go 0 for 10. You always have to have luck. That's what we have right now."

The Giants have something else very important -- Blanco's defense in left field.

He again came up with a big play, starting a 7-4-2 putout at home plate in the second as Detroit's Prince Fielder tried to score from first on Delmon Young's double.

Blanco had two cutoff men in his sight after fielding the ball -- shortstop Brandon Crawford and second baseman Marco Scutaro. He overthrew Crawford, but it went perfectly to Scutaro, who fired home, and catcher Buster Posey applied the tag.

"I don't know what Scutaro was doing there," Blanco said with a smile.

But Blanco's fine glove work is no accident.

In Game 1, he robbed Fielder and Miguel Cabrera with diving catches on sinking line drives. He also helped snuff a St. Louis rally in Game 7 of the NLCS with a running catch in the gap.

"Unbelievable," Pagan said of Blanco's defense. "I know what he means to this club. His glove has been outstanding for us."

Blanco's other base hit Thursday also drew attention.

He lined a ball up the middle in the second that glanced off the head of Tigers starter Doug Fister. Fister didn't even appear shaken up and stayed in the game. Blanco said he wasn't aware it hit Fister's head until he saw replays.

"I didn't know," Blanco said. "But I hope he's OK. It seems he's OK."

Everything, it seems, is turning out OK for the Giants.