Joan Guzmán is a Dominican former professional boxer who competed from 1997 to 2014. He held world championships in two weight classes, including the WBO super bantamweight title from 2002 to 2005, and the WBO junior lightweight title from 2006 to 2008.

Omar Andrés Narváez is an Argentine professional boxer. He is a two-weight world champion, having held the WBO flyweight title from 2002 to 2010, and the WBO junior bantamweight title from 2010 to 2014. As an amateur, Narváez represented Argentina at the 2000 Olympics, reaching the round of 16 of the super flyweight bracket.