IDK that Mitchell has enough firepower to outfight McGuigan at close quarters. I'd probably favor Battling Barry on points.
Scratch that, I forgot they peaked at different weight classes. IDK if the McGuigan that campaigned at 130 post-Cruz still had enough left to beat Mitchell.
I was confused at first, I didn't know if Mitchell fought at 126 before 130 and I just never looked into it. Mitchell handedly beats the McGuigan who actually fought at 130 IMO.