Monzón anses generelt som en af de allerbedste mellemvægtere gennem tiderne, på niveau med - eller over - boksere som [[Marvin Hagler]] og [[Sugar Ray Robinson]].<ref>{{Cite web |url=http://sportsillustrated.cnn.com/multimedia/photo_gallery/0911/boxing.top.ten.greatest.middleweights.alltime/content.8.html |title=Sports Illustrated's liste over de bedste mellemvægtere |access-date=17. september 2013 |archive-date=11. maj 2013 |archive-url=https://web.archive.org/web/20130511201311/http://sportsillustrated.cnn.com/multimedia/photo_gallery/0911/boxing.top.ten.greatest.middleweights.alltime/content.8.html |url-status=dead }}</ref><ref>[http://www.boxingscene.com/-top-25-middleweights-all-time-top-ten--24472 boxingscene.com's liste over de bedste mellemvægtere]</ref><ref>[http://boxrec.com/media/index.php/Division-By-Division_-_The_Greatest_Fighters_of_All-Time Boxrec.com's liste over verdens bedste boksere gennem tiderne]</ref><ref>{{Cite web |url=http://ringtv.craveonline.com/blog/169390-10-best-middleweight-titleholders-of-the-last-50-years?start=10 |title=The Rings liste over de 10 bedste mellemvægtere de sidste 50 år |access-date=17. september 2013 |archive-date=18. januar 2012 |archive-url=https://web.archive.org/web/20120118170013/http://ringtv.craveonline.com/blog/169390-10-best-middleweight-titleholders-of-the-last-50-years?start=10 |url-status=dead }}</ref>
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