Abner Mares was a commentator of Showtime boxing and he has held multiple world championships in three weight classes, including the IBF bantamweight title from 2011 to 2012, the WBC super bantamweight title from 2012 to 2013, the WBC featherweight title in 2013, and the WBA (Regular) featherweight title from 2016 to 2018. As an amateur boxer, Mares won numerous medals at international tournaments while representing Mexico.