He was perhaps most famous for his fights with fellow "Fab Four" members; Sugar Ray Leonard, Thomas "Hitman" Hearns and Roberto "Hands of Stone" Duran.
Thought by many to be one of the sports greatest ever middleweights, and an inductee of the International Boxing Hall of Fame and the World Boxing Hall of Fame, Hagler was named Fighter of the Decade in the 1980s by Boxing Illustrated magazine.
He was also twice awarded Fighter of the Year by The Ring magazine and the Boxing Writers Association of America.
Also considered one of the toughest fighters in the history of the sport, Hagler possessed outstanding boxing skills coupled with an iron chin that resulted in him being knocked down just once in his entire career, a knockdown that was, and is still considered contentious today.
Following his infamous bout with Leonard in 1987, Hagler would retire from the sport at the age of 34 with an outstanding career record of 62-3-2 before heading to the sunnier climes of Italy, where he would become an action film star.
On March 13, Hagler passed away aged 66.
While undoubtedly a great champion in his own right, Marvin "Marvelous" Hagler will always be best remembered for being part of the so-called Fab Four - an elite group of fighters in the shape of Thomas Hearns, Ray Leonard and Roberto Duran.
However, Hagler would cement his boxing legacy by competing against all three between 1983 and 1987, with his first such bout coming against the legendary "Hands of Stone "Duran on November 10, 1983.
Boasting an impressive 77-4 record heading into the fight, Duran had already been involved in two epic bouts with Sugar Ray, the second of which would result in the now-infamous "no mas" declaration from the frustrated Duran as he succumbed to an eighth-round technical KO.
Prior to winning the title, Hagler had claimed the impressive first-round knockout of 1976 Olympic gold-medallist Sugar Seales as he established himself as a major force to be reckoned within the middleweight ranks.
Minter, like many a British fighter, (Henry Cooper and Ricky Hatton for example) was particularly vulnerable to cuts and, having received four deep and wide gashes in the early rounds, was stopped by referee Carlos Berrocat and a third round TKO was declared at Wembley Arena, leading to some unruly scenes amongst a hugely disgruntled home crowd.
Despite having retired from the sport over 30 years ago, Marvin Hagler has certainly made good use of his career earnings and is now said to have a net worth estimated to be around $45million.
In the final bout of his career against Ray Leonard, Hagler would enjoy his biggest payday, collecting $20million, having earned over $5million for his win over Duran in 1983.
Planet Sport looks at three of the greatest rounds you will ever witness inside a boxing ring between Marvelous Marvin Hagler and Tommy Hearns in 1985 on April 15.
Marvelous Marvin Hagler was fighting in his first super-fight against a Roberto Duran who had previously had two fights with Sugar Ray Leonard.
From a ringside seat to Hagler vs Leonard to meeting icon Frank Sinatra, U2 have special memories of being in Las Vegas.
In an extract from his book, Brian Doogan takes a look at the late, great champion, Marvelous Marvin, who had a big impact on an all-time great from Ireland.
The boxing fraternity continues to mourn the loss of boxing legend Marvelous Marvin Hagler.
Hagler died suddenly on Saturday, aged 66, leaving the boxing fraternity mourning the loss of a legend.
Bob Arum promoted an all-time classic between Hagler and Thomas Hearn - a fight which lasted just three rounds but got named as Fight of the Year in 1985.
