"The biggest thing is to be comfortable at the plate, putting good at-bats together," den Dekker said.
Manager Matt Williams sees den Dekker as a valuable player off the bench next season. He could provide power from the left side.
"He has good power. He plays all three outfield positions. He has a bright future," Williams said. "We are so right-handed dominate that he fits. He hits from the other side of the plate. We'll get through the rest of the season, evaluate and see where he is at. He has been impressive for sure."
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All theTime. He also can be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.