Centurion and Diamond Back were both brand names marketed by Western States Importer (WSI) at some time around '90 they dropped the Centurion name and rebranded the bikes with Diamond Back. That is also about the time they went to the Tigged frames which was likely a cost savings.
I wonder if the deal with Dave Scott went sour and dropping the Centruion name was the only way to scrap the deal. Or they were just cashing in the popularity of their MTBS by rebranding their road bikes.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk