1 & 2 McDonnell based on his jab, Otieno not getting enough clean despite his constant pressure. Third definitely the Kenyan's for his body punching, blocking a good deal of McDonnell's jabs on his turtle shell.
It was in relative terms. Arreola had more unexpected difficulty with Releford than Thompson did with Harris (dispatched with unexpected ease, actually). It was still quite one-sided.
4-1 JM Otieno might do very well against an actual bantamweight of more similar proportions. Here the reach is killing him.
The Kenyan has a good chin by the looks of it. Looked that way going in, if Boxrec is anything to go by :rofl