Marquis has only allowed a walk through four innings, and all four of his strikeouts have come on swings and misses. He's spotting his fastball effectively, and has had a good slider all night. He's thrown 52 pitches through four innings, and when the Padres got their only baserunner (on a walk by Anthony Rizzo), Marquis got a double play ball on the next at-bat.
And Morse's 10th homer of the season, which came in the second inning, was one of the more impressive shots you'll see this year. He hit a 1-2 fastball from Mat Latos some 427 feet, into the upper tier of the second deck in left field. A couple of the Padres beat writers said they've only seen a handful of players hit the ball up there, and the shot was so loud, you knew it was gone right when it left the bat.
The Nationals could stand to add on, but through four innings, they're looking good.