what was robbie lawler ranked when he beat him? he was 8-1 at the time
gomi was a champion when nick beat him. it's sophistry to claim that wasn't a win, btw.
bj was a top ten WW when nick beat him.
http://www.sherdog.com/news/rankings/5/Sherdog-Official-Mixed-Martial-Arts-Rankings-30994
so was paul daley, who diaz beat that same year.
http://www.sherdog.com/news/rankings/5/Sherdog-Official-Mixed-Martial-Arts-Rankings-30994
there's this thing some posters do that is all about discrediting. yeah, bj got his ass beat by edgar and is over the hill. yeah, where is daley now.
but that can be done with every fighter. the point is where were they ranked at the time?
even zaromskis was top ten when nick beat him.
none of this is relevant to nick vs. silva though. a prime silva was faster and is still bigger than nick and technically better. the only real question is whether anderson is really over the hill and how he comes back from a potentially career ending injury.