When it was time for the Orioles to take the field for the fourth inning, nobody went out to left field. Presumably, Felix Pie was supposed to go back after striking out in a run-production situation, but Ty Wigginton eventually came out of the dugout and headed to the outfield.
Don't really know what's going on, but I'm sure we'll find out soon. Should be interesting.
Instant update: The Orioles just announced that Pie left the game with "stomach discomfort."