Middleweight World/Lineal Champions (160lbs)

Johnny Wilson (17/3/1921 – 31/8/1923)

Wilson became the first undisputed champion at 160lbs on defeating Mike O’Dowd 
Harry Greb (31/8/1923 – 26/2/1926)
Tiger Flowers (26/2/1926 – 3/12/1926)
Mickey Walker (3/12/1926 – 19/6/1931)

Walker moved up in weight
Marcel Thil (11/6/1932 – 23/9/1937)

Thil beat Gorilla Jones to unify the IBU/NBA titles 
Fred Apostoli (23/9/1937 – 2/10/1939)
Ceferino Garcia (2/10/1939 – 23/5/1940)
Ken Overlin (23/5/1940 – 9/5/1941)
Billy Soose (9/5/1941 – 31/10/1941)

Soose moved up in weight
Tony Zale (28/11/1941 – 16/7/1947)

Zale (1) beat Georgie Abrams (2) 
Rocky Graziano (16/7/1947 – 10/6/1948)
Tony Zale (10/6/1948 – 21/9/1948)
Marcel Cerdan (21/9/1948 – 16/6/1949)
Jake LaMotta (16/6/1949 – 14/2/1951)
Sugar Ray Robinson (14/2/1951 – 10/7/1951)
Randy Turpin (10/7/1951 – 12/9/1951)
Sugar Ray Robinson (12/9/1951 – 19/12/1952)

Robinson took time away from boxing with a view to retirement before coming back in 1955 and eventually regaining the title 
Carl Bobo Olson (21/10/1953 – 9/12/1955)

Olson (2) beat Randy Turpin (1)  
Sugar Ray Robinson (9/12/1955 – 2/1/1957)
Gene Fullmer (2/1/1957 – 1/5/1957)
Sugar Ray Robinson (1/5/1957 – 23/9/1957)
Carmen Basilio (23/9/1957 – 25/3/1958)
Sugar Ray Robinson (25/3/1958 – 22/1/1960)
Paul Pender (22/1/1960 – 11/7/1961)
Terry Downes (11/7/1961 – 7/4/1962)
Paul Pender (7/4/1962 – 7/5/1963)

Pender retired
Dick Tiger (10/8/1963 – 7/12/1963)

Tiger (1) beat Gene Fullmer (2) 
Joey Giardello (7/12/1963 – 21/10/1965)
Dick Tiger (21/10/1965 – 25/4/1966)
Emile Griffith (25/4/1966 – 17/4/1967)
Nino Benvenuti (17/4/1967 – 29/9/1967)
Emile Griffith (29/9/1967 – 4/3/1968)
Nino Benvenuti (4/3/1968 – 7/11/1970)
Carlos Monzon (7/11/1970 – 29/8/1977)

Monzon retired
Rodrigo Valdez (5/11/1977 – 22/4/1978)

Regardless that Mike Colbert was the number one contender, Valdez (2), supported by the WBC, beat the WBA’s Bennie Briscoe (3) to receive universal recognition 
Hugo Corro (22/4/1978 – 30/6/1979)
Vito Antuofermo (30/6/1979 – 16/3/1980)
Alan Minter (16/3/1980 – 27/9/1980)
Marvin Hagler (27/9/1980 – 6/4/1987)
Sugar Ray Leonard (6/4/1987 – 27/6/1987)

Leonard moved up in weight
Michael Nunn (25/3/1989 – 10/5/1991)

Nunn (2) beat Sumbu Kalambay (1) 
James Toney (10/5/1991 – 13/2/1993)
Toney moved up in weight
Jorge Castro (10/12/1994 – 19/12/1995)

Castro (3) beat John David Jackson (1). Gerald McClellan was effectively already up at super middle
Shinji Takehara (19/12/1995 – 24/6/1996)
William Joppy (24/6/1996 – 23/8/1997)
Julio Cesar Green (23/8/1997 – 31/1/1998)
William Joppy (31/1/1998 – 12/5/2001)
Felix Trinidad (12/5/2001 – 29/9/2001)
Bernard Hopkins (29/9/2001 – 16/7/2005) 
Jermain Taylor (16/7/2005 – 29/9/2007)
Kelly Pavlik (29/9/2007 – 17/4/2010)
Sergio Martinez (17/4/2010 – 7/6/2014)
Miguel Cotto (7/6/2014 – 21/11/2015)
Saul Alvarez (21/11/2015 – 18/4/2018)

Alvarez suspended by the Nevada State Boxing Commission after failing two drug tests

Gennady Golovkin (18/4/2018 – 15/9/2018)

Golovkin had already unified the IBF/WBA/WBC titles

Saul Alvarez (15/9/2018 –

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