(Jonathan Daniel/GETTY IMAGES)

“It’s been rough having my own rough start, then watching the guys struggle to runs and not be out there,” said DeRosa, who went 3 for 37 before landing on the disabled list Sunday. “We’ve been pitching great, and just haven’t been scoring any runs.”

The Nationals replaced DeRosa by recalling 25-year-old slugger Tyler Moore from Class AAA Syracuse. While Moore started his first game Sunday, Manager Davey Johnson plans to use him primarily as a bench player. Tonight, Xavier Nady will start in left field, with Bryce Harper in center and Jayson Werth in right.

In his major league debut Sunday, Moore went 1 for 3 with a line-drive single. A career first baseman, Moore also made a running catch in left field, where he began playing only a few days before his call-up.

“Unless somebody has a little injury, I’ll probably just use him off the bench, probably pinch-hit him,” Johnson said. “I liked what I saw. … But there’s a lot of players ahead of him that need to play. I need to get Nady going. I still have a lot of confidence in him.”