Abner Mares Martínez is a Mexican-American professional boxer who also works as a boxing analyst and commentator for Showtime. 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. He grew up in the city of Hawaiian Gardens, California and holds dual citizenship with Mexico and the United States.

Juan Manuel López Rivera, often known as Juanma Lopez, is a Puerto Rican former professional boxer who competed from 2005 to 2019. He is a world champion in two weight classes, having held the WBO junior featherweight title from 2008 to 2009, and the WBO featherweight title from 2010 to 2011. As an amateur he represented Puerto Rico at numerous international tournaments, including the 2002 Central American and Caribbean Games, the 2003 Pan American Games, and the 2004 Olympics. López was considered a knockout artist at his peak in the late 2000s and early 2010s.