Looked lathergic at times to me.

Shaking his hands like trying to get them going stepping back at times (which is not his style) and taking some really heavy breaths there during some rounds.

Stamina issues maybe?
Poor training?
Or just a bad start...

He was head hunting too much.
What surprised me more then anything was that he didn't jump on Gaudet after the knock down I know it was a bit of a flash knockdown but knowing "La Zorrita" Soto like I know him he's one to go for the kill.