There's a few things going on here, as M's manager Dan Wilson told reporters after the game that he didn't think Munoz was tipping pitches. Personally, as someone who there with those reporters, I'm not sure I believe him,

Seattle Mariners catcher Cal Raleigh thinks All-Star closer Andrés Muñoz was tipping pitches when he squandered a two-run lead in the ninth inning against the New York Yankees.

Yankees baserunners Trent Grisham and Cody Bellinger appeared to wave their hands from second base when Muñoz would throw a slider.