That itself could have its own potential pitfalls. What if it's released that their player says otherwise, or even worse the referee says the opposite?
You're then pushing yourself into a position, where you won't want to back down from, where you're challenging an officials honesty and integrity.
Or we're getting into a tit-for-tat affair with the FA or those lot in their big tin shed? Holgate's and the club's character will be under extra scrutiny.
I'm pretty sure the club would have explained that Sam et al. should remain professional and hold their cards against their chests'.
As
@Caolam mentions, back Mason in private, work tirelessly behind the scene to build a strong case and then act resolutely during any hearing.