If you consider Marquez and Morales are currently fighting at 140,it becomes a bit of a no contest. After that I'd say Zab was clearly in possesion of the best after them.
Boxing is what have you done for me lately,that's why i said garcia and bradley,uness he stays at welterweight.
well its tough now with so many departures from the weight by bradley and alexander khan just lost 2 but his resume is still solid at 140 JMM and Morales dont really have resumes at 140 this is a difficult one might it be Mattysse
Morales and Marquez only went upto 140 in the last couple of years. They have done more damage as featherweights so shouldnt be considered the best at 140 yet.