WASHINGTON — In the midst of a third-inning meltdown Monday, Mets starter Noah Syndergaard summoned catcher Travis d’Arnaud to the mound. Something was not right with Syndergaard; his command had oddly disappeared. Moments later, Syndergaard called for d’Arnaud again, and boos rained down from Washington Nationals fans.
A pedestrian Mets offense had staked Syndergaard to an early four-run lead, but even Syndergaard, their best pitcher, wilted, delivering by far his worst start of the season. A head-shaking 11-4 loss Monday to a division rival capped a miserable day for the Mets.
“Just frustrating and kind of embarrassing outing because of the standards I put underneath myself to go out there and achieve,” Syndergaard said.
Two of the Mets’ young starters have dealt with elbow problems in recent starts, and neither offered encouraging progress Monday. The Mets acknowledged that Steven Matz’s…