Charlie Morton loves his gum balls — literally. And that may be an issue for the New York Yankees.

Yankees manager Joe Girardi went out to speak with home plate umpire Mark Carlson early in Game 7 of the ALCS, who later spoke with Houston Astros manager A.J. Hinch. FS1’s broadcast crew aired the footage and suggested that Girardi was complaining about Morton touching bubble gum in his mouth while pitching for Houston.

Pitchers are not allowed to touch a foreign substance like that, especially one that could be used to alter a grip or change a ball’s spin.

ESPN’s Buster Olney also speculated that Girardi was talking with Mark Carlson about the gum issue.