The Washington Times - May 17, 2012, 06:56PM

Today, as he described it, was a big day for Mark DeRosa. The Nationals veteran utility man who has been dealing with a left oblique strain since April 29, ran, threw and took some dry swings, testing his injury with the most activity he’s done since before he went on the disabled list.

DeRosa plans to join the Nationals on their upcoming nine-game, 10-day road trip that will take them to Philadelphia, Atlanta and Miami and Nationals manager Davey Johnson said DeRosa might be a week away from returning to the active roster.

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“I think it’s all predicated on how I feel day-to-day,” DeRosa said Thursday. “I did a lot today. I’d like to be back as quick as possible but I don’t want to go back to square one, either.

“We’re doing it slow. I can do pretty much everything, it’s just the fast-twitch stuff.”

DeRosa aggravated the injury on the Nationals’ previous homestand when Bryce Harper stole home on Phillies lefty Cole Hamels and gave DeRosa an aggressive high five. He appears to be past that setback.

“I told him, ‘I don’t want you high-fiving with your (left) hand anymore,” Johnso said. “But he said yesterday that he wasn’t having any discomfort. I think he was eligible to come off (Monday), but I think he’s about a week away.”