LOS ANGELES – The Mets tried to accomplish a series split against the Dodgers by doing something old and doing something new. The old: rallying late, coming back and taking the lead. The new: Buck Showalter using his closer in the eighth inning, rather than the ninth, to face the three best hitters at the top of the Dodgers order. That decision didn’t exactly work, but the Mets beat the Dodgers, 5-4, in 10 innings anyway thanks to timely hitting from J.D. Davis. Edwin Diaz protected a two-run Mets lead when Showalter flipped the script and called on his closer for the eighth inning. Diaz was l…