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MLB won’t address Mariners pitcher’s mystery substance

Whatever was smeared under the hat of Seattle pitcher Yusei Kikuchi, it hasn’t turned into a sticky situation for the Mariners, Yankees or Major League Baseball.

A day after a dark substance was spotted under the bill of Kikuchi’s cap in a win at Yankee Stadium — possibly illegal pine tar — all sides kept cool.

MLB issued no penalty or even a statement on the matter Thursday.

“It’ll work itself out,” Mariners manager Scott Servais said before the series wrapped up.

Yankees manager Aaron Boone said his team looked at the tape and even though he “had thoughts about it,” he wouldn’t make them public.