Cedric Mullins waited for the pitch to break, then turned and unloaded. As the ball floated high through the air, some fans flung their arms up, unable to wait until it dropped over the right field fence. With one swift swing, Mullins had doubled the Orioles’ run total and given them an 8-5, fifth-inning lead over the visiting St. Louis Cardinals in the first of a seven-game homestand. The next…