OK I'll give it a shot. Even though I don't have any reference material here at home.
The roller pitting looks like overloading or corrosion.
The color in the outside race indicates over heating. There also appears to be galling / pitting in the overheated area to indicate overloading. Is this the thrust / load direction?
I cant tell what you are showing us in the picture of the shaft.
The pic of the end of the bearing races looks like corrosion or foreign material intrusion.
I will assume that overloading was prevented by design engineering, so, heat, pitting, foreign material... possibly the lube pump inlet slowly became blocked causing bearing over heat and failur. Maby throw in a baked seal or two? From what is presented that would be my first guess.
OK let the flaming begin
