Espana was a hell of an underrated fighter, Arroyo was good, not great, in his prime - which was short. Espana, late KO.
I have a feeling both fighters would hit the mat before this was over. But before he had his soul taken by Jimmy Paul, Arroyo was a damned good fighter who was capable of coming back from severe adversity. I've got him outlasting Espana and stopping him late.