After being swept by the Philadelphia Phillies to start the week, the Colorado Rockies host the Washington Nationals for a four-game series. The Rockies took two of three from the Nationals when they were in D.C. in July.
The Nationals give Ross Detwiler (1-0, 2.35 ERA) his second start of the season now that Jason Marquis was shipped off to Arizona. He came up on July 5 for a spot start and then moved to the bullpen. He made an appearance in the Nationals' July 9 game against the Rockies, pitching two shutout innings of relief. He's never been much of a strikeout pitcher (5.3 K/9), but his WHIP this season is in the 1.1 range, 0.4 less than his career WHIP. In 2009, Detwiler was lit up for six runs in four innings.
Esmil Rogers (4-1, 7.31 ERA) makes his first start since returning from the disabled list. He did throw five innings of relief on Saturday in Ubaldo Jimenez's abbreviated start. He allowed one run in five innings and struck out four.
First pitch is scheduled for 6:40 p.m. MT.