Walter Matthysse

Walter Dario Matthysse Sr. (born August 29, 1978) is an Argentine former professional boxer who competed from 2002 to 2009. He challenged for the IBF welterweight title in 2007 and at regional level held the WBO Latino welterweight title three times between 2004 and 2006. He is the older brother of former featherweight world champion, Edith Soledad Matthysse, and welterweight world champion of boxing, Lucas Matthysse.

Professional career
On July 14, 2007, Kermit Cintrón was dominant in his first title defense, knocking down the Argentine Matthysse three times on his way to a knockout victory twenty-nine seconds into the second round. Prior to this match, Matthysse had never been knocked down by any opponent, although he had suffered a tenth-round technical knockout loss in May 2006 at the hands of Paul Williams (the Cintrón-Matthysse bout was the main undercard fight of a WBO title bout between challenger Williams and incumbent Antonio Margarito).

Professional record

 * - style="margin:0.5em auto; font-size:95%;"
 * style="text-align:center;" colspan="8"|26 wins (25 knockouts), 5 losses (5 knockouts), 0 draws, 1 no contest
 * - style="text-align:center; margin:0.5em auto; font-size:95%; background:#e3e3e3;"
 * style="border-style:none none solid solid; "|Res.
 * style="border-style:none none solid solid; "|Record
 * style="border-style:none none solid solid; "|Opponent
 * style="border-style:none none solid solid; "|Type
 * style="border-style:none none solid solid; "|Rd., Time
 * style="border-style:none none solid solid; "|Date
 * style="border-style:none none solid solid; "|Location
 * style="border-style:none none solid solid; "|Notes
 * - align=center
 * Loss || 26–5 (1)||align=left|🇦🇷 Oscar Daniel Veliz
 * TKO
 * 5 (6), 0:15
 * 2009-06-06
 * align=left|🇦🇷 Gimnasio Municipal Nº 1, Trelew, Chubut
 * align=left|
 * - align=center
 * Loss || 26–4 (1)||align=left|🇨🇩 Alex Bunema
 * KO
 * 6 (12)
 * 2008-07-11
 * align=left| 🇨🇦 Uniprix Stadium, Montreal, Quebec, Canada
 * align=left|For WBA Inter-Continental light middleweight title.
 * - align=center
 * Loss || 26–3 (1)||align=left|🇦🇷 Sebastian Andres Lujan
 * TKO|| 10 (12) || 2007-10-19
 * align=left|🇦🇷 Club Atletico Newell's Old Boys, Santa Fe, Argentina
 * align=left|
 * - align=center
 * Loss || 26–2 (1)||align=left| Kermit Cintron
 * KO||2 (12), 0:29||2007-07-14
 * align=left|🇺🇸 Boardwalk Hall, Atlantic City, New Jersey
 * align=left|For IBF welterweight title.
 * - align=center
 * Win || 26–1 (1) ||align=left|🇦🇷 Jorge Dario David Gomez
 * TKO|| 2 (10) || 2006-10-20 ||align=left|🇦🇷 Gimnasio Municipal Nº 1, Trelew, Chubut
 * align=left|
 * - align=center
 * Loss || 25–1 (1)||align=left|🇺🇸 Paul Williams
 * TKO
 * 10 (12), 1:56
 * 2006-05-27
 * align=left|🇺🇸 The Home Depot Center, Carson, California
 * align=left|For vacant WBO NABO welterweight title.
 * - align=center
 * Win || 25–0 (1)|| align=left|🇦🇷 Juan Carlos Alderete
 * TKO|| 1 (12) || 2006-04-01
 * align=left|🇦🇷 Club Atletico Union, Santa Fe, Santa Fe, Argentina
 * align=left|Retained WBO Latino welterweight title.
 * - align=center
 * Win || 24–0 (1)||align=left|🇺🇸 Xavier Toliver
 * KO|| 1 (10) || 2005-12-08 ||align=left|🇺🇸 4th and B, San Diego, California, USA
 * align=left|Won WBC FECARBOX welterweight title.
 * - align=center
 * style="background:#ddd;"|NC || 23–0 (1)||align=left|🇦🇷 Roberto Hernan Reuque
 * NC || 2 || 2005-10-22 ||align=left|🇦🇷 Club Atletico Newell's Old Boys, Santa Fe, Argentina
 * align=left|Retained WBO Latino welterweight title.
 * - align=center
 * Win || 23–0 ||align=left|🇦🇷 Juan Italo Meza
 * KO || 6 (8) || 2005-09-10
 * align=left|🇦🇷 Gimnasio Municipal Nº 1, Trelew, Chubut
 * align=left|
 * - align=center
 * Win || 22–0 ||align=left|🇦🇷 Juan Carlos Villagra
 * KO || 8 (10) || 2005-05-20
 * align=left|🇦🇷 Gimnasio Municipal, Puerto Madryn, Chubut, Argentina
 * align=left|
 * - align=center
 * Win || 21–0 ||align=left|🇨🇴 Raul Martinez
 * TKO || 1 (12) || 2005-03-11
 * align=left|🇦🇷 Club Ciclista Juninense, Junín, Buenos Aires, Argentina
 * align=left|Won WBC Mundo Hispano light middleweight title.
 * - align=center
 * Win || 20–0 ||align=left|🇦🇷 Silvio Walter Rojas
 * TKO || 2 (10) || 2004-12-03
 * align=left|🇦🇷 Super Domo Orfeo, Cordoba, Argentina
 * align=left|
 * - align=center
 * Win || 19–0 ||align=left|🇦🇷 Carlos Adan Jerez
 * RTD || 8 (12) || 2004-10-08
 * align=left|🇦🇷 Super Domo Orfeo, Cordoba, Argentina
 * align=left|Retained WBO Latino welterweight title.
 * - align=center
 * Win || 18–0 ||align=left|🇦🇷 Facundo David Tolosa
 * KO || 2 (10) || 2004-09-03
 * align=left|🇦🇷 Estadio Socios Fundadores, Chubut, Argentina
 * align=left|
 * - align=center
 * Win || 17–0 ||align=left|🇦🇷 Hector Ignacio Avila
 * RTD || 2 (10) || 2004-08-06
 * align=left|🇦🇷 Club Ciclista Juninense, Junín, Buenos Aires, Argentina
 * align=left|
 * - align=center
 * Win || 16–0 ||align=left|🇦🇷 Ruben Dario Oliva
 * TKO || 2 (12) || 2004-06-04
 * align=left|🇦🇷 Gimnasio Municipal Nº 1, Trelew, Chubut, Argentina
 * align=left|Retained WBO Latino welterweight title.
 * - align=center
 * Win || 15–0 ||align=left|🇦🇷 Jorge Dario David Gomez
 * TKO || 2 (10) || 2004-04-17
 * align=left|🇦🇷 Club Atletico Union, Santa Fe, Santa Fe, Argentina
 * align=left|
 * - align=center
 * Win || 14–0 ||align=left|🇦🇷 Javier Alejandro Blanco
 * TKO || 2 (12) || 2004-03-20
 * align=left|🇦🇷 Club Ciclista Juninense, Junín, Buenos Aires, Argentina
 * align=left|
 * - align=center
 * Win || 13–0 ||align=left|🇦🇷 Marcos Carlos Alegre
 * TKO || 1 (8) || 2004-01-16
 * align=left|🇦🇷 Trelew, Chubut, Argentina
 * align=left|
 * - align=center
 * Win || 12–0 ||align=left|🇦🇷 Lorenzo Marquez
 * RTD || 3 (8) || 2003-11-14
 * align=left|🇦🇷 Club Ciclista Juninense, Junín, Buenos Aires, Argentina
 * align=left|
 * - align=center
 * Win || 11–0 ||align=left|🇦🇷 Carlos Ignacio Molinas
 * KO || 3 (8) || 2003-10-10
 * align=left|🇦🇷 Club Ciclista Juninense, Junín, Buenos Aires, Argentina
 * align=left|
 * - align=center
 * Win || 10–0 ||align=left|🇦🇷 Eduardo Jesus Oscar Rojas
 * TKO || 3 (6) || 2003-08-22
 * align=left|🇦🇷 Club Ciclista Juninense, Junín, Buenos Aires, Argentina
 * align=left|
 * - align=center