Jon Lester hurled seven strong, scoreless innings as Boston bested Baltimore, 2-1, in the third of a four-game set at Fenway Park.
Lester (1-2) scattered four hits, striking out a season-best nine batters while walking two for his first victory of 2009. Takashi Saito allowed a run in the final inning but held on to record his first save of the season.
Dustin Pedroia knocked in a run for the Red Sox, who have taken the first three games in the series and have won four in a row overall. Kevin Youkilis doubled and scored while Mike Lowell drove in the other run.