Freddie Roach with his greatest pupil Manny Pacquiao
Floyd Mayweather, Manny Pacquiao, the Klitschko Brothers, all these names belong to great fighters, but behind every great fighter is usually a pretty great trainer, too.
Whether that trainer be Freddie Roach or Emanuel Steward, trainers have an important role in guiding their fighters to great career-making victories.
Here are the 10 best boxing trainers of the last 10 years.
Goossen has helped guide many careers but his most notable are likely to be the best years of the career of Joel Casamayor (38-6-1, 22 KO) and the late-great Diego Corrales (40-5, 33 KO).
Corrales fought like a warrior who would never back down. Goossen took that, improved upon it and helped to guide the improved Corrales into some of the most memorable wars of the past decade.
Ronnie Shields training David Tua
Ronnie Shields is currently training super bantamweight (122 lbs) Guillermo Rigondeaux (8-0, 6 KO), considered one of the greatest amateur boxers of all time.
Shields also trains Mexican heavyweight standout Chris Arreola (34-2, 29 KO), who has only two losses. One of those to heavyweight legend Vitali Kltischko (43-2, 30 KO) and another former Shields pupil, Tomasz Adamek (44-2, 28 KO).
Shields continues to change boxers and adapt to them from Mike Tyson (50-6, 44 KO) to Evander Holyfield (44-10-2, 29 KO).
His client-list is extensive and full of talent.
Floyd Mayweather Sr.
Floyd Mayweather Sr. is the man who taught undefeated boxing talent Floyd Mayweather Jr. (42-0, 26 KO) his defensive technique.
Though his brother Roger Mayweather would take over as his son's trainer for the majority of his career, Mayweather Sr.'s impact and continued advice cannot be overlooked.
Mayweather trained Chad Dawson (31-1, 18 KO) until some time before his first loss to Jean Pascal (26-2-1, 16 KO). Dawson became a very slick and effective light heavyweight (175 lbs) under Mayweather.
Mayweather trained Laila Ali (24-0, 21 KO).
Mayweather has also on occasion trained Oscar De La Hoya (39-6, 30 KO) and Ricky Hatton (43-2, 32 KO).
Buddy McGirt holding Arturo Gatti
James "Buddy" McGirt has helped late great junior welterweight (140 lbs) Arturo Gatti (40-9, 31 KO) and light heavyweight (175 lbs) standout Antonio Tarver (29-6, 20 KO).
During Tarver's career best victories over Roy Jones Jr (54-8, 40 KO), McGirt was the one advising Tarver in his corner.
Though McGirt isn't successful in everybody's corner, he remains a hot name for new talent to come to.
Roger Mayweather himself was a decent two-division world champ, but it's his handling of his nephew Floyd Mayweather Jr. (42-0, 26 KO) that's made him famous.
For the majority of Mayweather Jr's decorated career, Uncle Roger has guided the young Mayweather through his toughest challenges and helped make them look quite easy.
Mayweather's other clients are not nearly as noteworthy, but he'll continue to get notice and recognition for the way in which he has molded Mayweather's career.
Richardson coaches Shane Mosley
Naazim Richardson has done well honing the craft and skills of future Hall of Famer and middleweight (160 lbs) and light heavyweight (175 lbs) king Bernard Hopkins (52-6-2, 32 KO).
Outside of Hopkins, Richardson has helped revitalize welterweight (147 lbs) champion Shane Mosley (46-7-1, 39 KO).
For his work with the Marquez Brothers alone, super bantamweight (122 lbs) and featherweight (126 lbs) king Rafael Marquez (40-7, 36 KO) and lightweight (135 lbs) king Juan Manuel Marquez (53-6-1, 39 KO), Beristain has an argument as trainer of the century thus far.
Outside of them, he's worked with bantamweight (118 lbs) standout Abner Mares (21-0-1, 13 KO) and four-division Mexican legend Jorge Arce (59-6-2, 44 KO) and current WBC featherweight (126 lbs) champ Jhonny Gonzalez (50-7, 43 KO).
With his solid technique, many Mexicans have become and are becoming world champions.
Emanuel Steward is known mostly for bringing up the likes of Tommy Hearns and whatnot in the 1980's, but Steward's latest accomplishments could reenter him into the Hall of Fame.
He's taken on and further improved Wladimir Klitschko (56-3, 49 KO). Since taking him on in 2004, Klitscko has only lost once and has a 14-fight winning streak and became undisputed Heavyweight world champ.
Steward also picked up Miguel Cotto (36-2, 29 KO) after his devastating loss to Manny Pacquiao (54-3-2, 38 KO). Cotto would go on a two-fight winning streak at a new weight class before dropping Steward.
The reasoning has been stated to be money, but his success while under Steward is undeniable.
Steward also guided Lennox Lewis (42-2-1, 32 KO) into a successful retirement that included getting revenge against Hasim Rahman (50-7-2, 41 KO) and defeating Vitali Klitschko (43-2, 40 KO).
Roberto Garcia was a decent super featherweight (130 lbs) who was among the best at his weight at the time.
When Garcia retired, he took that experience and applied to training some of boxing's most magnificent boxers of the last decade.
Garcia currently trains his brother and junior welterweight (140 lbs) contender Mikey Garcia (27-0, 23 KO) as well as current WBA lightweight (135 lbs) world champion Brandon Rios (28-0-1, 21 KO).
Garcia also used to train Victor Ortiz (29-3-2, 22 KO) until right before Ortiz lost to Marcos Maidana (31-2, 28 KO). Under Robert Garcia, Ortiz only lost once by disqualification.
Robert Garcia also took Antonio Margarito (38-7, 27 KO) on when he came back from his year-long suspension for illegal handwraps. Margarito has only lost once to Manny Pacquiao since coming back.
Possibly Garcia's most successful pupil so far is Nonito Donaire (27-1, 18 KO). The 29-year-old Filipino American has already won world titles in three weight classes and plans to win another in 2012 at super bantamweight (122 lbs).
With Garcia's guidance, Donaire as well as Rios will continue to dominate and create plenty of success.
Freddie Roach trained Manny Pacquiao for the last 10 years. That transformation from Filipino hopeful to world icon alone is enough to earn Roach the No. 1 spot.
That's not to mention his work with aging Virgil Hill (50-6, 23 KO) when he moved up from the light heavyweight (175 lbs) division.
Hill won his first cruiserweight (200 lbs) world title at age 36 by knocking out Fabrice Tiozzo (48-2, 32 KO) in Round 1, sending him to the canvas three times in the process.
Hill won a vacant WBA cruiserweight world title at age 42 against a 30-0 undefeated Valery Brudov (39-3, 28 KO).
For the past three years, Roach has taken Amir Khan (26-1, 18 KO) under his wing in the aftermath of his first loss in 2008. Since then, Khan has won his first world title and has a eight-fight winning streak.
With even more clients coming in and being improved by Roach every day such as undefeated rising Mexican star Julio Cesar Chavez Jr (44-0-1, 31 KO), it seems unlikely he can be dethroned.