Don't know, maybe they factor in that they believe that JMM was robbed but should official ratings really take that into account? John is becoming irrelevant but still.
They also have Linares at 7 which seems a little low even though his accomplishments don't quite match up to how good people think he is. Still he's behind Naoki Matsuda who's number 6 which seems odd, the guy's resume is lacking, not to mention I've seen him fight on the same card as Linares and he's not that great.
Bookmarks