Question: What former unified light-welterweight world champion helped found the Super Boxing League?

Context articles: Sergey Kovalev (boxer)
Brian Viloria
Freddie Roach (boxing)
Yuriorkis Gamboa
Denis Lebedev
Super Boxing League
Amir Khan (boxer)
Kazuto Ioka
Julius Indongo
Kostya Tszyu

Sergey Alexandrovich Kovalev (Russian: Сергей Александрович Ковалёв ; born 2 April 1983) is a Russian professional boxer.
 He is a former unified light heavyweight world champion, having held the WBA (Undisputed), IBF, and WBO titles between 2013 and 2016.
 "The Ring" magazine named him their Fighter of the Year in 2014, and in July 2016 he was ranked as the world's best light heavyweight by "The Ring" and BoxRec; both of which also ranked him as the world's third best active boxer, pound for pound.
 Kovalev is well known for his formidable punching power.
Brian Viloria (born November 24, 1980) is an American professional boxer of Filipino descent.
 He is a former unified WBA and WBO flyweight champion, as well as a former WBC and IBF light flyweight champion.
 His nickname of "The Hawaiian Punch" was first given to him by Jesus Salud, a fellow Hawaiian of Filipino descent and himself a former world champion in boxing.
Frederick Steven "Freddie" Roach (born March 5, 1960) is an American boxing trainer and former professional boxer.
 Roach is widely regarded as one of the best boxing trainers of all time.
 He is the enduring boxing coach of the eight-division world champion Manny Pacquiao, five-time and four-division World Champion Miguel Cotto, former WBC Middleweight Champion Julio César Chávez, Jr., defensive master and three-time world champion James Toney, former UFC Welterweight Champion Georges St-Pierre, as well as top prospects Jose Benavidez, Peter Quillin, and Vanes Martirosyan.
 Roach was the trainer of former two-time world champion and notable women's champion Lucia Rijker.
 He has also trained former junior welterweight champion Amir Khan.
Yuriorkis Gamboa Toledano (born December 23, 1981) is a Cuban professional boxer.
 He is a former unified featherweight world champion, having held the WBA and IBF titles between 2009 and 2011.
 As an amateur he won a gold medal in the flyweight division at the 2004 Olympics, and bronze in the featherweight division at the 2005 World Championships.
Denis Aleksandrovich Lebedev (Russian: Денис Александрович Лебедев ; born 14 August 1979) is a Russian professional boxer.
 He is a former unified cruiserweight world champion, having held the WBA title since 2012 (promoted to Super champion in 2016), and previously the IBF title in 2016.
 In August 2016, Lebedev was ranked as the world's best cruiserweight by the Transnational Boxing Rankings Board; second best by "The Ring" magazine; and fourth by BoxRec.
The Super Boxing League is proposed professional boxing league of India.
 Bill Dosanjh and Amir Khan founded Super Boxing League in 2017 after Super Fight League first season.
 The league will be organised with the support of World Boxing Council and Professional Boxing Organisation India.
 The first season will have 8 teams comprising both men and women pugilist.
Amir Iqbal Khan (born 8 December 1986) is a British professional boxer.
 He is a former unified light-welterweight world champion, having held the WBA (later Super) title from 2009 to 2012, and the IBF title in 2011.
 Additionally he held the Commonwealth lightweight title from 2007 to 2008, the WBC Silver welterweight title from 2014 to 2016, and has challenged once for a middleweight world title in 2016.
Kazuto Ioka　(井岡 一翔 "Ioka Kazuto", born 24 March 1989) is a Flyweight boxer from Japan.
 He is the current WBA (Regular) Flyweight champion.
 He is also a former unified Minimumweight champion, holding the WBA and WBC titles, and a former WBA Light flyweight champion, therefore becoming a boxing triple champion.
 He was born in Osaka Prefecture, grew up in Sakai city, and currently lives in Osaka.
 As of May 2017, he is ranked as the world's best Flyweight by "The Ring" magazine and the Transnational Boxing Rankings Board, and second by BoxRec.
Julius Munyelele Indongo (born 12 February 1983) is a Namibian professional boxer.
 He is a former unified light-welterweight world champion, having held the WBA (Unified), IBF, and IBO titles between 2016 and 2017.
 As an amateur, Indongo represented Namibia at the 2008 Olympics, reaching the first round of the lightweight bracket.
Konstantin Borisovich "Kostya" Tszyu ( ; Russian: Константин Борисович "Костя" Цзю ; born 19 September 1969) is a Soviet-born Australian former professional boxer who competed from 1992 to 2005.
 He is a two-time light-welterweight world champion, having also held the undisputed and lineal titles of that division between 2001 and 2005.
 Tszyu was an exceptional all-around boxer-puncher who relied heavily on accuracy and timing, and carried formidable punching power; he is often regarded as one of the hardest-punching light-welterweights in the division's history.