This is not an ideal matchup for Washington who are struggling on the road and who are going to be sellers at the trade deadline, so there are a lot of unknowns with them. Parker is on the mound and he hasn’t been great on the road. The Lefty has had one road start in July and he gave up 5 earned runs and 2 walks. In his last three starts, especially his last start, he got blown out giving up 6 earned runs, 3 walks and one home run. His road ERA is higher at 4.91 with a road WHIP of 1.40. The Diamondbacks are going to get him for some runs, they have the better lineup and bullpen and in their last ten games, are outscoring opponents by eight runs per game. Their offense has been hitting in the month of July and shows no signs of slowing down. Arizona is putting up Montgomery on the mound who hasn’t been great this season, is inconsistent in spots, however, in his last few games his xFIP has shown positive regression, his ERA is much better and his WHIP has gone down in his last five starts. Out of his last five starts, he has only had one bad hiccup. In his last start, he looked much better, only giving up one run and one walk and he should carry that good form into this game. The Nationals are going to struggle to hit Montgomery in this road spot for them, they are only batting .246 as a team, and have lost by 3 runs plus in their last ten games. Head to head, the Nationals are 1-5 straight up in their last 6 meetings with the Diamondbacks. Arizona are 4-2 in their last 6 games when playing at home against Washington.

Best bet: take Arizona on minus -1 or on the runline (RL).