Soria suffered his seventh blown save this season, though he avoided tying the franchise record for losses (nine). Soria inherited two baserunners, and the loss therefore went to Matt Strahm.
The blown save spoiled a solid night from Royals starter Danny Duffy, who gave up three runs -- two on solo homers to Khris Davis and Ryon Healy -- over 7 1/3 innings.
The Royals' fading postseason hopes took another hit as they fell 4 1/2 games behind Baltimore for an American League Wild Card spot, pending the Orioles-Red Sox outcome.