How much credit does Roach deserve as a trainer? He seems to be mostly known for training Pacquiao, and not many other fighters. And let's be real, a drunk goldfish could have trained Pacquiao to win a world title.
People can NOT discredit Roaches work on Pacquiao... Pac was a left hand power dependent fighter up until Roach came in to use both hands for fully functional power, it was almost like he had the same amount of power with his right hand with his left. Without Roach, he'd be a much more one dimensional fighter and probably struggle way more with a lot of his fights, hell, he could've lost to Morales in the rematch.
Looks at Pacs assent to the top and then look who was in the corner. It wasn't an accident. Amir Khan was at his best under Roach - took what he had i'e speed and had him raiding in and out and making full use of it. It wasn't perfect but Khan doesn't win a world title under Virgil Hunter. Rosado under Roach has gone from being a a fairly average tough competitor to someone who should have gotten decisions over ranked opposition. Cotto had a late run under Roach and there are loads of others. I mean you look who he has trained and its a who's who's of champions and top class fighters. If people didn't believe in him and his methods they would simply go elsewhere.