Wei-Yin Chen got hit hard early and the O's never recovered in an 8-2 loss to the visiting Royals on Thursday night.
Chen (10-7) gave up four runs on four hits in the first inning and never really found his groove. His night was finished after just 4 2/3 innings, and he was charged with seven runs on nine hits and a walk.
Manny Machado made his long-awaited debut as an Oriole and went 2-for-4 with a triple and a run scored.
The O's win streak was snapped at five games...they have yet to win six straight this season. The two clubs go at it again on Friday night, with Miguel Gonzalez slated to pitch for the Birds.