The Potomac Nationals beat the Myrtle Beach Pelicans 3-0 on Sunday.
Nationals starting pitcher Erik Arnesen earned the win, improving to 3-2.
He pitched six and two-thirds shutout innings, walking one and striking out four.
Kyle Gunderson pitched an inning and a third and Josh Wilkie pitched the final inning to record his fifth save.
Stephen King and Boomer Whiting had two hits for Potomac (30-26 second half, 72-54 overall).
Dan Lyons had a double and two RBI and Andrew Lefave also recorded an RBI.
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