(Sports Network) - The Seattle Mariners hope to complete their first-ever three-game sweep in Boston this afternoon when they wrap up their set with the Red Sox at Fenway Park.

Jon Lester will try to stop that from happening, though, as he heads to the hill with four wins in his last six starts, including two consecutive victories. The latest win was a 4-0 decision over Baltimore, as the hard- throwing lefty tossed seven shutout innings against the O's, and scattered just five hits, while striking out eight batters.

Earlier this season Lester struggled against the Mariners, allowing five runs on eight hits and three walks in just 5 2/3 innings of work. In four career outings against Seattle the southpaw is just 1-1 with a 5.48 earned run average.

Brandon Morrow will toe the rubber for the Mariners, as the hard-throwing righty is still trying to find his groove in the rotation. Morrow has not been able to settle in as a starter and is coming off a tough outing against the Yankees in which he allowed three runs on five hits and five walks in just 4 2/3 innings of duty.

Morrow has made eight career appearances against Boston, but this will be his first start against the AL East-leading squad. In nine innings of work against the Sox, Morrow has surrendered three runs and has eight walks, but has struck out 11 batters.

Yesterday, Chris Woodward knocked in the deciding run in the ninth inning as Seattle clipped Boston, 3-2 to claim their first series win in Beantown since August 14-16, 2001. Russell Branyan added a pair of RBI for the Mariners, who have won three consecutive games and will be try to complete their first three-game sweep of the Red Sox since turning the trick from June 25-27, 2007 at Safeco Field.

"I think offensively, the key for us was just keeping the pressure on Penny," admitted M's manager Don Wakamatsu. "We ended up having a total of five walks today (overall) and just pressurized him from the get-go."

Roy Corcoran (2-0) hurled 1 2/3 innings of scoreless relief for the win. David Aardsma turned in a perfect final frame to notch his 17th save.

Jason Varitek's two-run homer was the only offense for the Red Sox, who have dropped the first two games in the series. Takashi Saito (2-2) was saddled with the loss after allowing the game-winning run with three walks in the ninth.

Saito began the fateful inning by walking Ken Griffey Jr., and two batters later walked Ryan Langerhans. Kenji Johjima followed with another base on balls before Woodward dumped a single to right which scored Wladimir Balentien, who was pinch-running for Griffey.

"It was a long, tough inning for Saito," said Red Sox manager Terry Francona. "We had to work for everything. Because of lack of command, you get in a situation where you have runners all over the bases. We had to play the infield somewhat in. When he did make a good pitch on Woodward, (Pedroia) just can't quite get to it."

Aardsma retired the Sox in order in the home half to lock up the win.

The Mariners, who have swept a two-game set in Fenway, won two of three games from the Red Sox at Safeco Field from May 15-17 but are just 7-17 over their last 24 visits to Fenway Park.