By: Eric He

AP photo: San Diego Padres starter Paul Clemens works the delivery against the San Francisco Giants hitters in the third inning at AT&T Park in San Francisco on Monday night

They faced the hapless Padres, but the Giants were dealt a setback in the NL West division race on Monday as they were shutout 4-0 at AT&T Park.

Jeff Samardzija took the loss as the Giants provided him with no run support and only five hits. The flu-ridden Paul Clemons tossed five shutout innings to get the win for the Padres.

Samadzija, who falls to 11-10 on the year, allowed single runs in the fourth and fifth innings before giving him a 2-run homer to former Giants’ catcher Hector Sanchez. Sanchez’s blast landed just fair in right field to extend the Padres’ lead to 4-0.

Meanwhile, the Giants couldn’t get anything going against the Padres’ bullpen. They had just three base runners in the final four innings in a disappointing offensive showing.

“We hit the balls hard: we just missed a couple,” manager Bruce Bochy said, via MLB.com. “Really some hard hit balls, couldn’t get anything to fall in, and when we had guys on base we couldn’t get a hit. We just couldn’t get that big hit to get us rolling.”

The Giants left eight runners on base and came up empty in six opportunities with runners in scoring position.

They fall to four games back in the division to the Dodgers, but are still a game and a half ahead of the Mets in the wild card race.

Albert Suarez toes the rubber on Tuesday in the second of this three-game series against the Padres.