ORIOLES
J.J. Hardy, SS
Nick Markakis, RF
Adam Jones, CF
Vladimir Guerrero, DH
Derrek Lee, 1B
Matt Wieters, C
Mark Reynolds, 3B
Felix Pie, LF
Blake Davis, 2B
Alfredo Simon, SP
BLUE JAYS
Yunel Escobar, SS
Eric Thames, RF
Jose Bautista, 3B
Adam Lind, 1B
Edwin Encarnacion, DH
Travis Snider, LF
Aaron Hill, 2B
Rajai Davis, CF
J.P. Arencibia, C
Ricky Romero, SP
Romero is a lefty, but his changeup makes him very tough on right-handed hitters, which is presumably why Blake Davis is playing second instead of Robert Andino, and Felix Pie is in left field over Nolan Reimold.
Also, second baseman Brian Roberts continues to experience migraine headaches after workouts. He's still been able to work out and do some baseball activities, but as long as he keeps having the headaches, it's impossible to predict when he'll return.
By the way, because of their trades today, the Blue Jays will have only a 22-man roster for tonight's game.