What the Mets need to focus on heading into June's Subway SeriesThe Mets and Yankees will face off June 10-11 at Yankee Stadium5/28/2019, 11:53 PMMay 22, 2019; New York City, NY, USA; New York Mets starting pitcher Jacob deGrom (48) pitches against the Washington Nationals during the first inning at Citi Field. Mandatory Credit: Brad Penner-USA TODAY Sports / Brad Penner