PHOENIX, Ariz. — Before Friday night’s game against Arizona, struggling Boston right fielder J.D. Drew was hoping for a little more luck at the plate.

After sitting out two games in Oakland, he hit the ball hard in three of his four at-bats on Thursday, yet wound up just 1 for 4.

“When I square up a ball, it seems like I hit it hard at somebody. I need some of those to hit the grass,” he said.

Well, Friday night, the balls Drew hit didn’t find nice soft landing spots in the grass at Chase Field. They found better destinations.

Drew clouted two drives that crash-landed in the seats, a pair of three-run homers, and later added an RBI double, sparking the Red Sox to a 10-3 victory over the Diamondbacks before a crowd of 40,435.

The first homer traveled just to the left of the 413-foot marker in center field and gave the Red Sox a 4-0 lead at the expense of walk-prone left-hander Doug Davis.

Considering the depths of his slump it was only his second extra-base hit in 54 at-bats and his first HR in 114 at-bats that might have been a nice enough night for Drew, who was batting .224 with two homers and 17 RBI and not exactly earning the $70-million, five-year deal the Sox had lavished on him as a free agent.

But there was more. In the sixth, with two on and one out, Drew pulled a three-run homer to right off right-hander Edgar Gonzalez, giving the Red Sox a commanding 9-1 lead. And just for good measure, Drew laced a double to right-center in the eighth, delivering Eric Hinske from first base for a 10-1 advantage.

Manager Terry Francona said the major contribution from Drew was a welcome sight.

“That’s the J.D. [the Sox have been waiting for]. He won’t do that every night, but when he swings like that, he makes the guys in front of him better and becomes a big connector to the rest of the lineup,” said Francona.

Julio Lugo, another megabucks free-agent signing not justifying his big contract (4 years, $36 million) led off the game with a homer to left. It was his fourth homer of the year, but only his second extra-base hit in 67 at-bats.

On the mound, meanwhile, was the unbeaten Josh Beckett, who cruised to 9-0, surrendering three runs, only two of which was earned, in eight innings.

Beckett, backed by Drew’s power show and contributions from Lugo and Manny Ramirez (RBI single), became the sixth pitcher in Red Sox history to win his first nine decisions in a season. Roger Clemens was the last, going a Sox record 14-0 to begin the 1986 season.