Yankees stymied by Mariners pitcher with mysterious substance

After the Yankees were shut down by Seattle’s Yusei Kikuchi, they credited the left-hander, who didn’t give up a hit until the sixth inning. “Sometimes, you’ve got to tip your hat,’’ Cameron Maybin said of Kikuchi’s efforts after the Yankees were pummeled by the Mariners, 10-1, Wednesday night in The Bronx, ending their three-game winning…