The Yankees’ dugout won’t be the only thing that looks different next season. While the fact they will have a new manager in 2018 is no small thing, clues about the 2018 roster will emerge soon — with the first coming shortly after the World Series ends. Masahiro Tanaka has three days after the series’ conclusion to opt out of the final three years and $67 million of his contract. The right-hander made certain not to express any indication of what his plans might be either during the season or in its immediate aftermath following the ALCS Game 7 loss to the Astros — and that’s left executives around the game especially curious about Tanaka’s next move. He could decide to stay in the Bronx and complete the seven-year, $155 million deal, or test free agency.