Johnson added that DeRosa could be back on the field within two or three days. The utility man has been playing third base during his rehab stint with Class A Potomac, and Johnson said DeRosa would serve as the primary backup to third baseman Ryan Zimmerman in the Majors.
"[DeRosa] left me an email and said that he was feeling great," Johnson said. "He wanted to know what the plan was, and I said, 'Well, the plan was for you to get some at-bats and start feeling really good and let me know when you're feeling really good.' His answers was, 'I'm feeling great.'"
DeRosa has been on the disabled list with a strained left oblique since April 29. He also spent a few days away from the team to visit his ailing father, who passed earlier this month following a long battle with cancer.
DeRosa was 0-for-4 with two walks and two strikeouts in his two outings with Potomac entering Saturday. In 13 games with Washington before his injury, DeRosa played 82 2/3 innings in the outfield and 10 at third base, going 3-for-37 at the plate.