Baseball's top pitching prospect allowed just one hit -- a leadoff single -- struck out one and walked two before a lengthy rain delay ended his outing. The 21-year-old Giolito threw 29 of his 45 pitches for strikes and was in command against the Mets like a seasoned veteran.
Mets right-hander Matt Harvey (4-10) was the hard-luck loser despite striking out three and allowing just four hits in 3 2/3 innings.
Giolito's much-anticipated debut had to wait a little longer after rain delayed the start of the game by 55 minutes. Giolito was handed the ball by Secretary of the Army Eric Fanning and was brilliant after allowing a leadoff single to Curtis Granderson.
The 6-foot-6 Giolito registered his first career strikeout when he got Asdrubal Cabrera swinging and benefited from some nifty defense to get out of the first inning. He cruised until the rain came, and the 85-minute delay made for an easy hook by manager Dusty Baker.
Giolito will have to wait for his first major league victory because he only went four innings. Oliver Perez (2-1) got the win in relief.
Harvey got into trouble in the second inning but was better than he has been for most of the season. He continued his dominance against Harper, who's now 1 for 26 in his career against Harvey.
Mets: Granderson was removed from the game after the second rain delay and replaced by Alejandro De Aza. ... RHP Hansel Robles was struck in the right leg with a line drive in the seventh inning and walked off under his own power. ... LHP Steven Matz has a bone spur in his elbow and had his start pushed back from Wednesday to Thursday. ... RHP Noah Syndergaard has a small bone spur in his elbow but isn't expected to miss any time. ... 1B Lucas Duda is two weeks away from resuming baseball activities.
Nationals: An MRI confirmed RHP Stephen Strasburg has an upper back strain. Strasburg threw a bullpen session Tuesday afternoon.
Mets: RHP Logan Verrett (3-4, 4.14 ERA) makes a spot start for Matz as the rest of the rotation gets pushed back. The Mets will have one fewer arm available in the bullpen as a result.
Nationals: RHP Max Scherzer (8-5, 3.52 ERA) makes his 17th start of the season trying to bounce back from allowing four earned runs in a loss to Milwaukee on Saturday.