As of October 2014, the longest reigning middleweight champion was Bernard Hopkins who held the title for 10 years, 2 months, 18 days. During that time, he successfully defended his title 20 times.
Chris Eubank fought at three weights professionally. He started out as a Middleweight and held the WBO World Middleweight Title, he moved up to Super Middleweight and held the WBO World Super Middleweight Title, and in the last two fights of his career he moved up to Cruiserweight to challenged Carl "the Cat" Thompson for the WBO World Cruiserweight Title
The oldest boxer to win a title is Bernard Humphrey Hopkins. At the age of 49, he holds the current IBF, WBA and IBA light-heavyweight world championships. From 1994 until 2005, he held titles in the middleweight class.
Carlos Monzon was born on August 7 in the year 1942. Carlos is best known as being an Argentine boxer who held the World Middleweight Championship title for 7 years.
Bruno Sammartino.
Oscar De La Hoya - 6 WBO Junior Lightweight title; World WBO, IBF Lightweight titles;World WBC Junior Welterweight title;World WBC Welterweight title (failed to win IBF title);World WBC, WBA Junior Middleweight titles: WBO Middleweight title (failed to win World WBA, WBC, IBF titles).Thomas Hearns - 5World WBA Welterweight title;World WBC Junior Middleweight title;WBC, WBA Light Heavyweight titles:WBC Middleweight title (failed to win World WBA, WBC, IBF titles):WBO Super Middleweight title (failed to win the WBC title in controversial bout).'Sugar' Ray Leonard - 5World WBC, WBA Welterweight titles;WBA Jr. Middleweight title (failed to win WBC title);World WBC Middleweight title:WBC Super Middleweight title (failed to win WBO title):WBC Light Heavyweight title. (Won SMW and LHW titles in same bout).Floyd Mayweather, Jr. - 5WBC Junior Lightweight title;World WBC Lightweight;WBC Junior Welterweight title;World WBC, IBF Welterweight titles:World WBC Junior Middleweight title.
Bruno Sammartino
2 years
Joe Calzaghe of England who has held the WBO Super Middleweight championship for over 10 years (he won the belt on October 11, 1997).
i think Edge & Christian
Maryse held the title for 216 days or 7 months 6 days
Triple H from 15/12/2002 until 21/09/2003
Lex Luger held the title for 523 days or 1 year 5 months 8 days