Tyler Moore makes his 12th start for the Nationals, seventh this month. The rookie right-handed batter is 11 of 37 with two home runs and five runs batted in.

Nationals

1. Danny Espinosa, 2B

2. Bryce Harper, CF

3. Ryan Zimmerman, 3B

4. Michael Morse, DH

5. Adam LaRoche, 1B

6. Ian Desmond, SS

7. Tyler Moore, LF

8. Xavier Nady, RF

9. Jesus Flores, C

— Edwin Jackson, SP

Orioles

1. Brian Roberts, 2B

2. J.J. Hardy, SS

3. Chris Davis, RF

4. Adam Jones, CF

5. Matt Wieters, C

6. Wilson Betemit, 3B

7. Mark Reynolds, 1B

8. Nick Johnson, DH

9. Steve Pearce, LF

— Wei-Yin Chen, SP