Josiah Gray didn’t have it on Tuesday. Is there an easy fix for the issues which led to arm-side misses vs LA? While acknowledging the emotions of going up against his former team may have played a role in Josiah Gray’s rough, 3-inning, 90-pitch outing against the Los Angeles Dodgers on Tuesday night in the nation’s capital, the Washington Nationals’ manager, Davey Martinez, also offered more tangible explanations for what led to the starter’s struggles. “A lot of arm-side misses,” Martinez said. “Didn’t execute well tonight. Could have been a little bit that he was amped up to face his…