The youngest world champion in boxing history. WBA Light Welterweight Champion 1976 Mar 6 – 1977, WBC Welterweight Champion 1979 Jan 14 – 1979 Nov 30, WBC Light Middleweight Champion.
WBC Super Bantamweight Champion 1977 May 21 – 1983, WBC Featherweight Champion 1984 Mar 31 – 1984 Dec 8, WBA Super Featherweight Champion 1985 May 19 – 1986 May 24.
Ranks #36 on the list of "100 Greatest Punchers of All Time." according to Ring Magazine. WBC Lightweight Champion 1983 May 1 – 1984 Nov 3, WBA Lightweight Champion 1986 Sep 26 – 1987 Nov 21, WBA Lightweight Champion 199 Jul 9 – 1990 Apr 4, WBA Light Welterweight Champion 1991 Jun 14 – 1992 Apr 10.
Member of boxing's "Black Murderers' Row". World Colored Welterweight Championship - June 11, 1937 to August 22, 1938; World Colored Middleweight Championship - January 11, 1940 until the title went extinct in the 1940s; World Colored Middleweight Championship - January 15, 1943 until the title went extinct in the 1940s
Captured the IBF welterweight crown in his 20th pro bout. Won the WBA light middleweight title from David Reid in March 2000 and later that year unified titles with a 12th-round knockout against IBF champ Fernando Vargas. In 2001 became a three-division champion.
First boxer to be recognized as a septuple champion in history (counting championships from minor sanctioning bodies). WBC Super Featherweight Championship - August 7, 1983 – 1984, WBC Lightweight Championship - August 10, 1985 – 1987, WBO Light Welterweight Champion - March 6, 1989 – February 23, 1991, WBO Light Welterweight Champion - May 18, 1991–1992.
First Puerto Rican boxing sports writer to be inducted into the International Boxing Hall of Fame. He served Puerto Rican boxing for more than 50 years as a writer and eventual commissioner.
He is a multiple-time world champion, and the first Puerto Rican boxer to win world titles in four weight classes, from light welterweight to middleweight. In 2007 and 2009,
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