Chen (11-8) allowed two runs in six-plus innings and pitched even better than his final line suggested, as Baltimore defeated the playoff-bound New York Yankees 9-2 Saturday in the opener of a split doubleheader. Gerardo Parra, another pending free agent, had four hits and three RBIs as the Orioles prevented the Yankees from wrapping up the right to host Tuesday's AL wild-card game, at least for a few hours. Manny Machado hit his 34th home run, off Yankees starter Ivan Nova (6-11), and also drove in three runs. Chen struck out three, walked three and allowed four hits while getting through six scoreless innings against a lineup that included only one lefty, center fielder Brett Gardner. The Orioles could lose six players on their roster to free agency this offseason, including Chen, their only left-handed starter, and Chris Davis, who entered Saturday leading baseball with 45 home runs. Machado added an infield RBI single when Chasen Shreve relieved Nova during a four-run sixth.