BALTIMORE — Wei-Yin Chen won his fifth consecutive start and had a season-high eight strikeouts to lead the Orioles to a 2-1 victory over the Mariners on Friday.
Baltimore has won nine of its past 11 games. Each of its past seven games have been decided by one run, tying a franchise record set from June 21-29, 1956. It is 5-2 in that span and 22-17 in one-run games this season.
Chen, whose 12 wins tie a career high, allowed one run and five hits with one walk over 71/3 innings.
"Regardless of the analysis of the game, it starts and most of it is with Wei-Yin," Orioles manager Buck Showalter said. "He's really solid for us here lately in a time of need, obviously, standings-wise."
In his last start, July 24 against Seattle, Chen pitched eight scoreless innings. Over his past five starts overall, he is 5-0 with 2.53 ERA.
"He's tough," Seattle second baseman Robinson Cano said. "He threw everything for a strike. He's not a guy that is just going to give you anything."
Andrew Miller, acquired from Boston on Thursday, got the final two outs of the eighth for Baltimore.
The Orioles took a 1-0 lead on Manny Machado's single in the third. That ended the their scoreless streak at 19 innings, which included Thursday's 1-0, 13-inning loss to the Angels.
In the sixth, Machado led off with a double and Hardy drove him in with a two-out single for a 2-1 lead.
"It was one of those games where they beat you," Seattle manager Lloyd McClendon said. "We didn't lose."