Chavez , 30 , has struggled making weight the last few years .
Chavez , 30 , was once suspended nine months and fined $900,000 by the NAC for failing a marijuana drug test following a 2012 loss to Sergio Martinez at the Thomas & Mack Center .
Chavez , 30 , has struggled making weight the last few years and was once suspended nine months and fined $900,000 by the NAC for failing a marijuana drug test following a 2012 loss to Sergio Martinez at the Thomas & Mack Center .