Diamondbacks host the Nationals in first of 3-game series

The Arizona Diamondbacks host the Washington Nationals in the first game of a three-game series. Arizona leads the NL West with a 33-29 record, while Washington is third in the NL East at 31-32. Pitching match-up features Nationals' Foster Griffin (6-2, 3.76 ERA) against Diamondbacks' Merrill Kelly (5-3, 5.06 ERA). The Diamondbacks are favored at -135, with an over/under of 9 runs.