Tanner Roark won the final spot in Washington's rotation during spring training. Halfway through the season, he's the Nationals' top winner. Roark allowed only three singles over seven innings on Friday night, and Denard Span matched Cincinnati's hit total with his four singles, leading the Nationals to a 4-1 victory that extended their surge and the Reds' slump. Read more http://scores.espn.go.com/mlb/recap?gameId=340725117&teams=washington-nationals-vs-cincinnati-reds