@ETallitnics @JeremyECrawfordThe mount is using their own movement therefore the OA is triggered vs. the mount. the worry is that you can tell a mount to Disengage for free, allowing you to avoid all OAs

— Grant Myers (@realgrantmyers) March 21, 2016

If a mount provokes an opportunity attack, the attacker can target the mount or the rider (PH, 198). #DnD https://t.co/oPO9mdV4QR

— Jeremy Crawford (@JeremyECrawford) March 29, 2016

@JeremyECrawford @realgrantmyers @ETallitnics I think the question is: if the mount doesn't provoke due to disengage, can the rider be hit?

— James Endicott (@o76923) March 29, 2016

Nope. #DnD https://t.co/7WB8Nr9HeC

— Jeremy Crawford (@JeremyECrawford) March 29, 2016

@JeremyECrawford the rider provokes Attack of Opportunity when the mount uses Disengage action?

— ɟןǝsɯıɥ‾oɹbo@ (@ogro_himself) March 27, 2016

No. #DnD https://t.co/VejwtXs8HA

— Jeremy Crawford (@JeremyECrawford) March 29, 2016