I see some discoloring, like when a log is dropped on a limb and dirt gets rubbed into where it was smashed.
For sure retire the rope.
I tend to think that this isn't samson's fault if you had the rope sitting around for a while and aren't completely sure if mice or something else may've gotten in there.
Thinking about how rope is made, I can't imagine how this would happen and not be noticeable before it left the factory.
That stinks, though!
I just got a spool of Blaze if you want some!
love
nick