I have heard many times over the past years about how shot fighters will pull out victories when its pretty obvious they are done. Here are some examples IMO.
Jones reaching the level he was at before Tarver II
Morales vs. Pacquiao
Gatti vs. Mayweather or Baldomir
Judah vs. an opponent who can endure four rounds of one of the best boxers in the business.
Hopkins vs. heavyweights(Hopkins never had great footspeed, and I think these guys could easily walk through his punches).
Evander vs. heavyweights best
Toney going down to 220 and thus being able to move

It just seems people are so infactuated with the fighters they love or at least admire that they can't see how far their fighter has fallen.