you forgot Librado Andrade (if the canadiens dont claim him off the mexicans and you know they will once he beats Bute) and perhaps Arrerola
It's because they present pac's toughest challenges. Morales already beat him and JMM beat him twice. JMM beats him again if they ever fight and the baby bull KO's him. Soto loses though but I wouldn't mind seeing pac fight Guzman sometime next year.