The brunt of the Royals’ outburst at Camden Yards came against Dylan Bundy, who yielded seven runs without retiring a single batter.
Bundy then walked the next two batters before Alex Gordon hit a shot over the right-field wall to end Bundy’s outing.
All told, the Royals had nine hits in the inning and tied a club record with four homers.
Baltimore entered the game with a six-game losing streak. Reinstated from the disabled list before the game, Orioles second baseman Jonathan Schoop said, "I hope we can start a winning streak, turn it around today."