Marquez and Barrera probably stand the better chance than Morales, even though Morales has the reach. Morales likes to brawl more than the others, and gets a little further out of his comfort zone when faced with a slick boxer I think(though I base this on a past his prime Morales against Raheem). I think Barrera keeps his cool and fights his fight through any situation, and has the ability to get dirty back if Pep gets dirty with him. I do think, however, that Pep's slickness would be a lot more effective and harder to time(he was a MASTER at using angles, one of the best I've seen) than someone like Hamed's. I think that Pep's defense would cause a lot of problems for Barrera, but I also think Barrera's offense in close could give Pep problems, as Barrera is a fantastic counter puncher, and very quick off the draw. I don't think Pep would have as easy a time slipping punches and landing an easy counter without getting anything in return. I do, however, think that Pep's style(as Barrera would not be as effective if he was forced to push it) would be the one that dictated the pace of this fight, even though Barrera would be landing some shots of his own. Close call, but I'd take Pep by Decision.