"He has been as dependable as a Swiss watch, delivering one quality start after another, but Tuesday night Dan Haren was more like a Timex — he took a licking and kept on ticking.

The Angels' right-hander went seven innings, equaling the average length of his first 10 starts, but unlike those previous games, Haren did not give his team a chance to win.

The Oakland Athletics scored five runs in the first four innings, three of them on a pair of David DeJesus home runs, and cruised to a 6-1 victory at Angel Stadium.

Guillermo Moscoso, in his first big league start after being called up from triple A, gave up three hits in six shutout innings, and Josh Willingham added a two-run double in the third, as the A's ended a six-game losing streak.

Haren (4-3) is winless in his last seven starts, a lack of run support the culprit in most of those games but not Tuesday night.

"Dan's not going to be on every pitch, every night," Manager Mike Scioscia said. "They hit some balls with guys in scoring position and got a good lead. Dan settled down and put some zeroes up, but we couldn't get anything going offensively."

Haren ranked fourth in the American League in earned-run average (1.84) and fifth in strikeouts (66) entering the game, and he gave up only three homers in his first 10 starts.

The A's hit .200 with one home run and 10 runs during their losing streak, and they entered with 25 homers, the fewest in baseball.

But they showed plenty of muscle Tuesday, DeJesus ripping a solo homer to right on a full-count fastball in the second and a two-run shot to center on a first-pitch fastball in the fourth.

DeJesus entered with two home runs on the season — both in a May 4 game against Cleveland — and a .111 average (two for 18) and no homers against Haren.

"The first homer, it was a 3-2 count with no one on, and I wanted to challenge him," Haren said. "The next one he ambushed me on the first pitch."