The Nationals are one of the worst teams in baseball - especially when facing a lefty starter.

That will be the case in this matchup where Washington goes against southpaw Austin Gomber.

The Nationals were 16-40 against lefties last year. They are 1-5 this season versus them. 

The Rockies are tough at Coors Field. They had the highest home batting average and slugging percentage of any team last season. 

Colorado draws Trevor Williams, who is 0-1 with a 5.40 ERA this season. The Nationals have lost 36 of their last 53 road games.