A good trainer can make or break a fighter. Trainers are often only seen working the corner by fans. Those few seconds between rounds where they tell their fighter to use the jab more, or move to the left, or stop letting him steal rounds in the final seconds.
Besides these in-fight instructions, few see trainers doing the bulk of their job: pouring over hours of tape, finding flaws, devising strategies and game-planning how their guy can win the fight.
In recent weeks the boxing training world lost one of it's all-time greats with the passing of Hall of Famer Emanuel Steward. This left a gaping hole in the profession and a legacy that will be hard to equal.
These five men are also at the top of their games. They are all highly sought out and are simply the best in their profession.