The Washington Times - May 17, 2013, 10:05PM

SAN DIEGO — When Washington Nationals right fielder Jayson Werth went on the disabled list last week with a slight right hamstring strain, he did so with the hope that he would be ready to return as soon as he was eligible – on May 18.

But after he played in one rehab game, Werth felt some tightness, manager Davey Johnson said. He traveled to New York on Thursday to visit with specialist Dr. Keith Pyne and his return has been delayed at least a few days.

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According to one person familiar with the situation, the most likely return date for Werth now is Friday, May 24, when the Nationals return from the West coast to open a five-game homestand.

Werth was taken off his rehab assignment with Single-A Potomac on Friday afternoon and he did not play on Friday. It was unclear when the team planned for him to return to a rehab assignment, and it’d likely be largely based on how the right fielder was feeling.

General manager Mike Rizzo said on Thursday that the team needs to see Werth play some games and get a better feel for where he’s at before they decide to activate him.

“The setback is that he needs to be able to play and not have that act up,” said manager Davey Johnson. “We just need to get him past that so it’s nothing (serious). I mean, this is serious, but we need to get him to where it’s not a hamstring that’s injured and he re-injures it.

“That’s twice as long.”