Nothing in that right hand at all as far as i'm concerned, no telling punches at all leading up to it either and nothing landed that looked remotely damaging by Quinlan during the 2 rounds.
If that punch landed in the final rounds or a real tear up i could understand it but not midway through the 2nd.
Quinlans not even a devastating puncher (50% ish KO ratio) He did go over pretty hard from the push (that looked more forceful than the punch did) so maybe that done some damage.