The O's endured a rain delay that lasted over three hours before falling to Kansas City 7-3 on Saturday night at Camden Yards.
Chris Tillman was tagged for six runs on six hits (three homers) and two walks, fanning five. Miguel Socolovich came on in relief and served up a solo homer to a suddenly power-hitting Royals club.
Down 7-0, the O's made it a game with a three-run seventh, but the rally was cut short after Adam Jones grounded out with runners on second and third.
The Birds have now dropped two of three to Kansas City, the worst team in the AL. They need to win on Sunday afternoon to split the series and stay in the running, as the loss dropped them to third in the East and into third in the Wild Card race. Tommy Hunter takes the mound and will face ex-Oriole Bruce Chen.