From http://www.rds.ca/boxe/ Rubio failed to make the weight he has now two hours to drop 7 ounces. Unfortunatly we can ask if Rubio was really serious about his training and dedication for the fight.
I don't think this has to do with his training and dedication, but more with the fact that he is too big and has had trouble making MW for a while now.
Its for a title shot, I dont know what could give you more motivation than this to train well and have a nutritionist around to be sure you make weights. So is it his training or trainer? I dont know but something is wrong.
7 ounces is nothing maybe the scales he was using were a bit off or maybe the scales at the weigh in were off it can happen
That'd probably have been enough to do it if he didn't already, an hour of exercise without drinking would do it too.
of course! nobody wants to get drained like Margo against Mosley or Hearns against SRL. You should make the weight without going too low