Game 21 lineups: Nats vs. Astros

After an absolutely beautiful Saturday here at the ballpark, the clouds have rolled in and the temperature has dropped nearly 20 degrees for today’s series finale against the Astros. Hopefully that’s not an omen of things to come for the Nationals, who were all sunshine and roses on Saturday.

The Nats have a chance to win another series; it would be three of their last four if they can pull this off. And if they do, it could come on the shoulders of Mitchell Parker once again.

The rookie left-hander makes his second career start, hoping to pick up right where he left off Monday night in Los Angeles, where he held the mighty Dodgers to two runs over five innings and became the first Nationals starter to win his major league debut since Stephen Strasburg. It’s another tough challenge today for Parker in the Astros. If he can throw strikes as he did last time out, it’ll put him in a good position to succeed.

The Nats won Saturday in spite of another atrocious performance with runners in scoring position. They were 0-for-10 until Jesse Winker and Joey Meneses finally delivered in the bottom of the ninth and 10th to emerge with the walk-off win. They’ve got to do a better job taking advantage of their scoring opportunities today against Hunter Brown, a late substitution for Houston, which had to scratch scheduled starter Cristian Javier due to neck discomfort. Brown has made four starts this season, one of them an absolute disaster (nine runs allowed in two-thirds of an inning against the Royals), but he was much better last time out (two runs in six innings against the Braves).

WASHINGTON NATIONALS vs. HOUSTON ASTROS
Where: Nationals Park
Gametime: 1:35 p.m. EDT
TV: MASN, MLB.tv
Radio: 980 AM, 88.7 FM (Spanish), MLB.com
Weather: Cloudy, 52 degrees, wind 5 mph out to right field

NATIONALS
SS CJ Abrams
LF Jesse Winker
RF Lane Thomas
2B Luis García Jr.
1B Joey Meneses
C Riley Adams
3B Ildemaro Vargas
DH Nick Senzel
CF Jacob Young

LHP Mitchell Parker

ASTROS
2B Jose Altuve
DH Yordan Alvarez
RF Kyle Tucker
3B Alex Bregman
SS Jeremy Peña
LF Chas McCormick
1B Jon Singleton
CF Jake Meyers
C Victor Caratini

RHP Hunter Brown