SEATTLE (AP) – Ichiro Suzuki hit his second grand slam of the season and Mark McLemore had two doubles and two singles in four at-bats as the Seattle Mariners beat the Boston Red Sox 10-5 on Friday night.

Suzuki’s sixth-inning homer broke a 4-all tie and made a winner of reliever Julio Mateo (4-0), who got just one out but became the first Seattle pitcher since Joel Pineiro at the end of 2000 and start of 2001 to win his first four decisions.

Shigetoshi Hasegawa, who has held opponents scoreless in 46 of his 49 appearances this season, took over with the bases loaded and one out in the eighth. He struck out Gabe Kapler and pinch-hitter Kevin Millar on eight pitches.

Hasegawa pitched the ninth for his 12th save in 12 opportunities.

Bret Boone added a solo home run, his 30th, to become the eighth Mariner to reach that mark. He also hit 37 in 2001.

Suzuki’s home run, though, was the most exciting moment of the night. He lined a shot 397 feet into the right field stands after fouling off three two-strike pitches, including one that looked like an out when it floated near third base.

Boston’s Bill Mueller dropped it while trying to make a difficult sliding catch.

On the next pitch by Mike Timlin (4-4), Suzuki connected. Though he’s better known for slapping infield singles, it was exactly the kind of shot Suzuki routinely hits in batting practice.

The win helped Seattle stretch its AL West lead over Oakland to five games after the Athletics lost at home to Toronto.

The victory didn’t come easily, though.

The Red Sox loaded the bases with one out in the eighth against Armando Benitez. Todd Walker faced a full count and fouled off five strikes before walking, bringing in Manny Ramirez to make it 8-5 before Hasegawa extingushed the threat.

As dramatic as Suzuki’s homer was for Seattle, the sixth inning was equally frustrating for the Red Sox. Boston missed two chances to escape with double plays before Suzuki’s grand slam.

McLemore hit a one-out single to right, then was safe at second when Walker’s toss pulled shortstop Nomar Garciaparra off the bag on Dan Wilson’s grounder. Walker was charged with an error.

Willie Bloomquist then hit a hard grounder at Garciaparra, who apparently lost the ball when McLemore dodged it. It took an awkward bounce and pegged Garciaparra in the upper right chest.

He stayed in, only to see Suzuki’s homer fly out of the park.

McLemore had a big night, too, going 4-for-4 with two runs scored. His two-run double gave Seattle the early lead in the second, and he appeared to score on a play at the plate by sliding past catcher Jason Varitek.

Umpire Gary Darling called him out, bringing Seattle manager Bob Melvin from the dugout to protest. Fans booed during Suzuki’s ensuing at-bat, and again when the Red Sox came up.

Boone made it 3-0 in the third, hitting a one-out homer to right. Edgar Martinez drew a bases-loaded walk and John Olerud hit a sacrifice fly in the eighth to make it 10-5.

Notes: Boston CF Johnny Damon complained of tightness in his right hamstring and left as a precaution when he was due to bat in the third. He was replaced by pinch-hitter Damian Jackson. … Martinez extended his hitting streak to 10 games with a double to the left-field corner in the third. … Ramirez hit his seventh career homer off Moyer. He’s 15-for-38 (.395) lifetime against the lefty. … The sellout crowd of 46,171 was the largest of the season. … The roof was closed for the 14th time this season in the ninth inning.

AP-ES-08-16-03 0140EDT