The Washington Times - May 13, 2013, 09:11PM

LOS ANGELES — Washington Nationals’ outfielder Jayson Werth is expected to head out on rehab assignment, perhaps as early as Tuesday evening.

Nationals manager Davey Johnson said Monday evening that Werth would like to make another visit to his personal doctor in New York and then he plans to get some at-bats.

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“He wants to play (Tuesday) or the next day and join the club probably on Friday,” Johnson said. “He’s going to get some at-bats, probably in Potomac.”

Single-A Potomac will play at home this week so it’s likely that Werth would join them for any rehab assignment.

The Nationals will head to San Diego on Wednesday night to open a four-game series on Thursday and Werth is eligible to return from the disabled list on Saturday.

Werth has been testing his strained right hamstring with some running and other work while he’s been out and he told Johnson on Sunday that the spasming has largely subsided.

“I think the stomach (ailment) he had, he’s over that too,” Johnson said. “Maybe it’s that. I don’t really know. But it’s better, and he’s going to go play.”

Werth hasn’t played since May 2, when he felt his hamstring tighten for the second time that week reaching for a ball in the outfield in Atlanta. It wasn’t until last week that Johnson mentioned a stomach issue that was likely dehydrating Werth and playing a part in the cramping.