David Peterson, Sean Manaea roughed up in Mets' blowout loss to Nationals

Peterson appeared to have settle in nicely, retiring nine in a row, but the roof caved in on him in the fourth. Washington flipped the script on the Mets from Tuesday, putting together a seven-run inning of their own, with two of those coming against Peterson before they chased him from the ballgame.

Sean Manaea entered after a bases loaded walk and he didn't fare much better, forcing in another run with a HBP then giving up a grand slam to put this one out of reach. Peterson's ERA now sits at an ugly 6.53 after allowing seven runs on five hits and three walks over just 3.2 innings of work in his first start back in the rotation.

The Mets' offense did try to pick Peterson up after his rough start to the night, as they used a double and two walks to load the bases against Cade Cavalli with two outs in the first, but the righty struck out Tyrone Taylor with a 3-2 sinker up in the zone to dance his way out of danger.

Juan Soto had the double which started that first inning rally. The red-hot outfielder also got the Mets on the board in the third with an opposite-field homer for the second straight night, and then picked up his third hit to try to start a rally trailing by eight in the bottom of the fifth.

MJ Melendez followed Soto's knock with a single off the first baseman's glove. Francisco Alvarez immediately rolled into his sixth double play of the season, though, killing any hopes of a rally and allowing the Nats off the hook. The young backstop struck out looking in his other three AB's, bringing his average down to .123 over his last seven games.

Marcus Semien enjoyed himself a nice day at the plate, singling twice across his three at-bats.

Manaea ate the next two innings but fared just as poorly as Peterson. Washington tacked on five more runs against him, ripping seven hits, five of which went for extra-bases. Manaea's given up 15 runs over his last five appearances, raising his ERA to 6.14 for the season.

Carl Edwards Jr. gave up a run but threw well, striking out six over 2.2 innings of work.