BOSTON -- Outside Oriole Park in Camden Yards, vendors in Baltimore sell orange T-shirts bearing the words, "Fenway South," testament to the throngs of fans that flock to see the Red Sox play there, at a price much cheaper than they would pay at the Fens.

But given the way things have turned this season, someone might want to check the souvenir stands on Yawkey Way -- "Camden North" T-shirts may suddenly find a target audience.

With former Red Sox GM Dan Duquette watching from the same press-level booth he occupied when he was GM here, the Orioles made it five wins in five games at Fenway by edging the Sox, 2-1.

Josh Beckett allowed just five singles and did not walk a batter in eight innings, but was outdueled by one Wei-Yin (pronounced "way in") Chen, a Duke discovery from Taiwan who scattered seven hits and allowed just a run in seven innings.

The Orioles bunched three of their singles in the sixth inning, the last an RBI base hit by Robert (Curse of the) Andino. A fielder's choice scored the go-ahead run.

The Sox had taken a 1-0 lead in the third on a double by Darnell McDonald, fresh off the DL, a single by Marlon Byrd and a sacrifice fly by Mike Aviles.

But two late scoring chances failed to produce a run. The Sox had two on and no out in the seventh after singles by Adrian Gonzalez and Jarrod Saltalamacchia, but failed to score after McDonald bunted the runners over. Byrd whiffed and Aviles popped to first.

In the eighth, reliever Pedro Strop issued one-out walks to Kevin Youkilis and David Ortiz, but Will Middlebrooks flied out to center and Scott Podsednik, who had entered the game as a pinch-runner for Gonzalez in the seventh, bounced to first.

Bobby Valentine used two pinch-hitters in the ninth, but Jim Johnson struck out both Ryan Sweeney and Daniel Nava to polish off his 18th save.

The Red Sox fell back to .500 (28-28), four games behind Baltimore.