Didi Gregorius has explanation, but not solution, to his funk

WASHINGTON — Didi Gregorius was trying to explain the conundrum as best he could, even if he didn’t quite understand it himself. The Yankees shortstop, mired in a 1-for-41 slump — with stretches of 0-for-30 and 0-for-10 on either side of a lone single in the fifth inning Saturday at Yankee Stadium — said he…