Stephen Strasburg struck out five and walked none in three scoreless innings on Friday night in a rehab appearance for Single-A Potomac. It was the right-hander's second rehab start since Tommy John surgery sidelined him last summer. In his first start on Aug. 7, Strasburg struck out four and allowed a home run in 1 2/3 innings for Class-A Hagerstown against Greensboro. He also was clocked as high as 99 mph on his fastball. "I tried to treat it more like a normal game," said Strasburg. "I threw pitches I wanted to throw depending on the count."