Benoit took the loss, allowing three runs on two hits and two walks. He didn't retire a batter.
"They're making some mistakes, leaving the ball up in the zone, out over the middle of the plate," said Padres catcher Derek Norris. "We've just got to execute some pitches better in some situations."
Black pointed to the small sample-size of games and believes the bullpen will pitch better moving forward.
"They'll come around. They're not pitching like they're going to pitch," he said. "When you see their numbers at the end of the year, they'll be there. When you see their numbers now as a group, there are two or three guys not hitting on all cylinders."
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.