Like any workplace, the ballpark is filled with sounds of griping. There has been plenty over new rules this season that have added instant-replay challenges and attempted to end unnecessary home-plate collisions.

There is no griping from the Giants camp. Manager Bruce Bochy has won three of his four replay challenges, and Buster Posey has proven very adept at standing in front of the plate and applying swipe tags that have befuddled some catchers around the majors who are used to blocking the plate and do not mind getting slammed.

Both rules came together in one sweet moment for the Giants in Sunday's 4-3 victory against the Padres, which ended a three-game losing streak.

After a previously anemic offense took a 4-0 lead on Posey's two-run homer in the first inning and Angel Pagan's two-run single in the second, the Padres loaded the bases with two outs against Tim Lincecum in the third.

Chase Headley smashed a ball past first base into the right-field corner. Will Venable and Seth Smith scored easily, and Xavier Nady, coming around from first, was ruled safe as well, apparently beating superb relays by Hunter Pence and Brandon Belt.

The scoreboard said 4-3 Giants with a runner on third and two outs. Lincecum seemed to be in deep trouble.

However, Bochy immediately popped out of the dugout and challenged the safe call on Nady. The umpires in New York needed only 88 seconds to overturn it after replays clearly showed Posey's swipe tag on Nady's back before Nady brushed the plate with his back leg.

A Padres run came off the board in what became a one-run victory. Plus, the inning was over with Headley stranded at third.

"I've said I like replay, and that changed the game today," Bochy said. "I've been on the other side before replay when that's cost us a game."

Bochy knew he was going to challenge as soon as he left the dugout because he had a clear view of a tag that Posey announced he had felt. But Bochy waited until Shawon Dunston confirmed it from video central inside the clubhouse.

Posey's tag was perfect. He took Belt's throw in front of the plate and wheeled around to his left to tag Nady, who attempted a hook slide even though he had a clear path to the plate.