NEW YORK -- The Nationals are expected to call up right-handed reliever Christian Garcia to the big leagues when rosters expand to 40 men on Sept. 1, according to a baseball source.

Garcia, a former Yankees farmhand, is a combined 2-0 with a 0.79 ERA and 16 saves in 38 games for Double-A Harrisburg and Triple-A Syracuse.

"He deserves to be in the big leagues," the source said. "He would be a big help to the bullpen."

Nats will be in market for ideal center fielder

NEW YORK -- Once the season ends, the Nationals are expected to pursue a center fielder/leadoff hitter, and Braves outfielder Michael Bourn is someone who has been mentioned as a possible target for Washington. He will be a free agent after this season and is represented by agent Scott Boras.

Asked on Sunday if he has considered playing for the Nationals one day, Bourn said, "Not really. As far as the free agency goes, I'll just wait until the end of the season and we'll see what happens.

"I know my name has come up on different occasions with different teams, but right now, I play with the Atlanta Braves and I enjoy where I'm at right now. I'm having fun. I'm on a good team, thankfully. It's a blessing to be over here. I'm just going to ride all this all out for right now and see what happens at the end of the season."

The Nationals are currently alternating between Bryce Harper, Roger Bernadina and Jayson Werth in center field. Werth is most used to playing right field, while most believe Harper and Bernadina are corner outfielders.