Madson has thrown nine scoreless innings since the Nationals acquired him.
The Mets did not score until the ninth, when a two-run homer by James Loney off Washington reliever Shawn Kelley snapped a streak of 23 scoreless innings.
Bullpen delivers two scoreless innings — not without drama — to preserve 3-2 win that includes Ryan Zimmerman’s fifth home run.
Kelley had been dealing with an illness this week, but hurt his back Friday.
The Nationals placed first baseman Ryan Zimmerman on the 15-day disabled list on Thursday, the fourth position-playing starter to hit the disabled list in a little more than two months this season. Washington recalled outfielder Mat...