@mpetruzzStunning Strike specifies melee weapon attack. Why can’t the monk stun with unarmed? The monk can. An unarmed strike counts as a melee weapon attack.

— Jeremy Crawford (@JeremyECrawford) July 27, 2016

@mpetruzzHmm. I thought I’d read that monk unarmed attacks didn’t count as weapons when something said “with a weapon” That's true. But Stunning Strike doesn't say that. The rule is that an unarmed strike counts as a melee weapon attack.

— Jeremy Crawford (@JeremyECrawford) July 28, 2016