It had all the makings of a season changing, come-from-behind momentous win for the New York Mets, but once again the team's shaky bullpen coughed up the lead, not once but twice, as the Nationals grabbed a 5-4 10 inning win with the help of a game-ending wild pitch on Tuesday night.

Trailing 2-0 in the top of the ninth, Josh Thole and David Wright singled before Jordany Valdespin's pinch-hit, three-run homer off Nats closer Tyler Clippard. Because a fan reached over the wall and touched the ball, the homer went under review but was upheld giving the Mets a 3-2 lead. 

But Mets interim closer Bobby Parnell blew his fifth save by allowing three singles in the bottom half of the inning, including a liner of the middle to Danny Espinosa that tied the game 3-3.

Thole responded in the top of the tenth by smacking a huge RBI double that scored Daniel Murphy to put New York ahead 4-3, but the bullpen wouldn't be able to hold that lead either.

Bryce Harper scored pinch hitter Jnonatan Solano with an RBI triple off Tim Byrdak, who then intentionally walked the next two batters to setup the double play with bases loaded and one out.

Byrdak got Adam LaRoche to hit a ground ball that led to a force-out of Harper at home, but Terry Collins opted to bring in Pedro Beato who threw the wild-pitch that skipped off-of and over Thole allowing Ryan Zimmerman to cross from third with the game winning run.

Byrdak (2-1) was charged with the loss while Washington's Ryan Mathews (3-1) was credited with the win.

Game notes: A game that ended in such wild fashion actually started as a classic pitching duel. New York's Jonathon Niese struck out eight while allowing just three hits and a run over seven innings. Ross Detwiler was on his game as well, tossing seven shutout innings of five-hit ball. Valdespin's homer in the ninth came as he was pinch-hitting for Jason Bay who was playing in his first game back since suffering a concussion (Bay went 0-3).