D-Backs: Bats come alive in 14-4 victory over Nationals.
At Nationals Park, Washington, D.C.: Koch will be making his first big league start after five relief appearances this month. … This will be Koch’s first start since going 5 1/3 innings for Triple-A Reno on Sept. 4. … He had a four-inning relief outing for the Diamondbacks on Sept. 13, giving up no runs on two hits and one walk. … Scherzer is perhaps the favorite for the NL Cy Young, an award he won in 2013. He is leading the league in strikeouts and strikeout-to-walk ratio and has the lowest WHIP. … He gave up three runs in 6 2/3 innings against the Marlins on Wednesday. He struck out eight for the third consecutive outing.
Wednesday: At Washington, 4:05 p.m., Diamondbacks RHP Shelby Miller (2-12, 6.47) vs. Nationals LHP Gio Gonzalez (11-10, 4.51). Thursday: At Washington, 4:05 p.m., Diamondbacks LHP Robbie Ray (8-14, 4.77) vs. Nationals RHP Joe Ross (7-5, 3.48). Friday: At Chase Field, 6:40 p.m., Diamondbacks RHP Braden Shipley (4-5, 5.26) vs. Padres RHP Edwin Jackson (5-6, 5.77).