it wasnt the lack of bjj, that cost him this fight, it was the lack of a gameplan, well unless you call it a game plan to not jab and dont throw punches in general. He was looking for the one punch k.o, but he never got that opportunity. In the first round junior had several opportunities to jummp on cain after cain failed with a takedown, instead he chose to walk or run away. Awful game plan.
Cain on the other hand knew exactly what he had to do, he had a ganeplan from the get go and followed it. Greta performance from him.