By Tzvi Machlin Opening Day isn’t even here yet and the New York Mets season already appears to be in jeopardy following the latest MRI results for ace pitcher Jacob deGrom. ESPN MLB insider Jeff Passan reported on Friday that a new MRI revealed a “stress reaction in his right scapula” and that his return timetable is unclear. But it is significant enough for Passan to state that deGrom will miss a portion of the season – including Opening Day. DeGrom is coming off yet another outstanding year at the Mets ace. In 15 starts he went 7-2 with 146 strikeouts and an incredible 1.08 earned run avera…