WASHINGTON -- Entering Tuesday's action, Nationals shortstop Cristian Guzman was hitting .368, but hadn't drawn a walk in 57 at-bats this season.

Guzman has never been known to take walks over his 10-plus years in the big leagues, and manager Manny Acta doesn't expect him to change his ways at the plate now. Guzman's career high in walks is 46 in 2000.

"It's very difficult to turn Cristian into a patient guy," Acta said. "He has been doing it for too long. You can't have him turn on the switch and be patient. He is going to be an aggressive hitter who is going to be jumping on first, second and third pitches the rest of his career."