Jayson Werth played his fourth straight game in Class A Potomac on Saturday, further testing his improving hamstring and remained on track to rejoin the Nationals on Tuesday. Werth played only five innings, a shortened performance so that he could play close to nine innings on Sunday, which he expects to be the final game of his rehab stint before coming off the disabled list. Werth went 2 for 3 with a run scored and played right field for five innings. His movement on the field ranged from, mostly, light jogging to running. He jogged to first on his first single and ran harder on his second hit, a bloop single that dropped into right field. He scored from second on a single in the third inning, running hard and sliding into home plate. He jogged lightly out of the batter’s box in his fifth inning pop out. Afterward, Werth admitted there was still one minor and remaining step of running to test. “I’ve progressed each day,” Werth said of the hamstring. “I feel better and better and I think we’re at a point. I scored from second on a base hit and I’ve been moving around and playing the outfield. That last 10 percent is really what I was looking for and I think I’m at a spot where I can be confident and play my game without worrying about getting injured.” Werth, who last played on May 2, already had a shortened rehab stint on May 15 when he played three innings for Potomac. He felt his hamstring tighten again as he raced out of the batter’s box in his first at-bat. A subsequent MRI revealed that he had a more significant hamstring strain that originally thought. Werth has been resting his hamstring and receiving treatment, slowly ramping up his workouts last week.