OAKLAND, Calif. -- Something had to give Friday night when Baltimore Orioles left-hander Wei-Yin Chen and Oakland A's lefty Tommy Milone faced off at the O.co Coliseum.
Chen went 2-0 with a 0.71 ERA last year in his first two career starts against Oakland as a rookie. The only run he allowed in 12 2/3 innings came on a homer by Jonny Gomes, who is now playing for Boston.
Milone was 2-0 with a 2.74 ERA at the Coliseum this year after going 7-4 with a 2.74 ERA in home games last year as a rookie.
Chen and Milone matched zeroes for six innings before the Orioles broke through for an unearned run in the seventh and rolled to 3-0 victory.
Chen pitched eight scoreless innings, allowing two hits while striking out five and walking two. Closer Jim Johnson pitched a scoreless ninth, converting his 30th straight save dating to July 30, 2012.
Milone allowed six hits and one unearned run in 6 2/3 innings. He struck out five and walked one.
Baltimore added two runs in the ninth off reliever Ryan Cook, taking advantage of three walks and an error.
The Orioles beat the A's for the second straight night and won for the eighth time in their past 11 games. The A's lost their third straight game and seventh in their past eight.
Orioles shortstop J.J. Hardy led off the seventh with a single to right and took second on an error when the ball popped out of right fielder Josh Reddick's glove and Reddick slipped while pursuing it.
Then with one out, Steve Pearce singled sharply up the middle, just out of the reach of diving shortstop Adam Rosales, bringing Hardy home.
After Milone got the second out, Sean Doolittle came out of the bullpen and struck out Nick Markakis.
When the Orioles took a 1-0 lead into the eighth, they had to like their chances. They had won 101 straight regular-season games when leading after seven innings. Make that 102 straight now.
Chen didn't allow a hit until A's center fielder Coco Crisp singled with two out in the third, ripping a sinking liner that Orioles third baseman Manny Machado couldn't handle. A's third baseman Josh Donaldson struck out looking to end the threat.
In the fourth, Chen got some help from center fielder Adam Jones, who made a running catch on Jed Lowrie's deep blast to right center and held onto the ball after hitting the wall. A's first baseman Nate Freiman ripped a one-out double off the wall in right center, but Chen got the next two A's in order.
Milone pitched his way out of some trouble in the second. Nolan Reimold hit an infield single with one out. He advanced to second when Donaldson fielded Pearce's sharp grounder but threw high to second baseman Jed Lowrie, pulling his foot off the bag. But Milone got Alexi Casilla to hit into a double play.
Leading off the top of the fifth, Pearce launched a double high off the wall in center near the 400-foot mark. But Milone fanned Casilla and then retired Nick Markakis and Machado on popouts.
NOTES: The A's kicked off a two-day celebration in honor of their 1973 World Series championship team. Rollie Fingers, Sal Bando, Vida Blue, Joe Rudi and Reggie Jackson are among a long list of players taking part. ... Adam Rosales, who went 1 for 2 off the bench on Thursday in his first game since coming off the disabled list, made his first start of the season, at shortstop. After making 21 starts at short, Lowrie made his first start at second base. "It's more about Rosie," A's manager Bob Melvin said of the moves. "The versatility of Jed probably works against him at times. He'll still play some shortstop. His versatility would suggest he could play anywhere up the middle. And Rosie's best position is probably shortstop." ... Casper Wells made his first start since being acquired from the Toronto Blue Jays on April 22. He started in left field and batted eighth. ... Orioles leadoff hitter Nate McLouth, who leads the team in walks (14) and steals (7), was out of the starting lineup. "I think part of the reason Nate's doing so well is he's got really fresh legs," Orioles manager Buck Showalter said. "... Catcher Taylor Teagarden will "probably" start Saturday against the Oakland A's while regular starter Matt Wieters gets the day off, Showalter said. Teagarden, who has made three starts this season, is 0 for 11. ... Showalter still hasn't named a starting pitcher for Monday's game at Seattle. Left-hander Zach Britton would be one option if he's not needed in relief against Oakland. Veteran right-hander Freddy Garcia is 3-0 for triple-A Norfolk. "We're going to get through these next three games as good as we can, then see where we are with our options," Showalter said.