LOS ANGELES >> A week after the big trade that brought Adrian Gonzalez, Josh Beckett and six other players to Los Angeles, the Dodgers are still struggling to win games.

Even a pre-game meeting that general manager Ned Colletti and manager Don Mattingly had with the new players didn’t produce immediate results. They lost their eighth in a row to the Arizona Diamondbacks on Friday night, a 4-3 defeat in 11 innings after rallying to tie the game in the fifth.

“It’s frustrating to come up short with the offense we have, which is capable of scoring five, 10, 15 runs in a game,” said Shane Victorino, who joined the team a month ago in a trade from Philadelphia. “But everybody is giving their best effort and that’s all we can ask. Hopefully we can get going and get on a roll. We’re capable of doing it, and I can say that ’til I’m blue in the face, but we’ve got to go out there and show it.”

The Dodgers’ losing streak against Arizona ties their longest since dropping eight in a row against the D-backs from July 2-Sept. 29, 2005. They fell to 2-5 since last Saturday’s trade and remain 4 ½ games behind NL West-leading San Francisco.

“We’ve got to take care of our own business,” Mattingly said. “If we can’t put wins together, it’s not really going to matter.”

The Dodgers tied the game 3-3 with two outs in the bottom of the fifth on Mark Ellis’ two-run single and Andre Ethier’s RBI single over the head of shortstop Jake Elmore that scored Matt Kemp, who walked and stole second.

But Brad Bergesen (1-0) struck out Kemp and Ethier and retired A.J. Ellis on a fly ball with runners at the corners to end the game.

“Everybody’s kind of pressing a little bit, instead of just relaxing and having fun,” said Dodgers starter Aaron Harang, who didn’t figure in the decision while allowing three runs and five hits in five innings, with three strikeouts and two walks.

“Everybody’s playing with a chip on their shoulder and trying to do too much, so I kind of feel like we’ve just got to loosen up. The big thing is that guys are going to pick one another up, so once we get the key hits to fall in, we’ll get on a roll. We’ve got to find our consistency again.”