SEATTLE (AP) - Jake Peavy's slide continued, and soon he might not have a spot in Boston's rotation.
Kyle Seager had an RBI double in the first inning and hit a three-run homer in the fifth off Peavy as the Seattle Mariners won their fifth straight, 8-2 over the Red Sox on Tuesday night.
Boston has dropped five of six on its West Coast road swing, while Peavy's personal skid continued. He's lost six straight decisions, his only win this season coming on April 25 against Toronto. In the 11 starts since his victory, Peavy has left the mound with the lead only once.
Seager delivered the big blow with his shot that was part of Seattle's four-run fifth inning. Mike Zunino also homered in the fifth and Peavy (1-6) has allowed 16 homers in 16 starts this season.
"It's been mistakes on the plate that he hasn't been afforded the opportunity to get by with them," Boston manager John Farrell said. "He's been, I think, better in terms of not issuing walks tonight. But when he's made mistakes on the plate, that's when he's paid for them."
Boston's pitching rotation is beginning to get healthy. Clay Buchholz is coming off the disabled list to start on Wednesday. Brandon Workman is returning to the rotation following a suspension, with the intent on starting this weekend in New York against the Yankees.
Peavy may be running out of time to find a solution to his problems.
"It's not fun. There is nothing fun about getting beat, especially when you don't do your job and get beat," Peavy said. "It's frustrating and there is no other way to say it."
Farrell didn't address Peavy's situation specifically when asked if it was time to consider a change with the role of the veteran right-hander.
"We are considering everything that is available to us," Farrell said. "We know by early afternoon a roster move has to be made for Clay coming on, so we will take a look at everything."
The victory was Seattle's 15th in June and secured consecutive winning months for the first time since 2012. The Mariners (42-36) are six games over .500 for the first time this season.
"There is a really good feeling in the clubhouse," Seager said. "We know what we have in here. We feel good about it and we feel like we'll be able to sustain it."
Seattle has mostly been winning with pitching, but the bats have shown up against the Red Sox. Logan Morrison had the big blows in the series opener with two home runs. It was Seager's turn on Tuesday.
Seager's double in the first scored Endy Chavez and Morrison followed with a sacrifice fly for an early 2-0 lead. Chavez tripled for the second straight night in the second inning to score Brad Miller for a 3-0 lead.
Seattle's big inning started with Robinson Cano's one-out single to put runners on the corners. Seager turned on an inside pitch from Peavy just inside the right-field foul pole and off the windows of the cafe in the outfield. Seager was barely back in the dugout when Zunino lined his homer into the Mariners bullpen, nearly hitting reliever Danny Farquhar for a 7-2 lead.
"I got in trouble and made a bad pitch to Seager, and the ballgame gets away from you trying to be too fine and save every last run you can save," Peavy said.
Joe Beimel (2-1) got four outs in relief of Seattle starter Erasmo Ramirez to get the victory. Ramirez again failed to get deep into the game and was done after 4 1-3 innings.
Boston missed a chance for a big first inning against Ramirez when after three walks A.J. Pierzynski grounded out on the first pitch to end the inning.
"I know we have better hitters than what we've put out there and I believe these guys are going to get going," Pierzynski said.