Conversation so far:
What was Kevin Nash's job?
Nash debuted in World Championship Wrestling.
What was this?
Steel", one half of the tag team known as the Master Blasters.
What did this do for him?
Blaster Iron, with whom he made his debut at the Clash of the Champions on September 5, 1990, defeating Brad Armstrong and Tim Horner.
What did this do?
They would defeat Horner and Rotundo on several house shows.
On September 22, Nash's partner Master Blaster Iron was replaced by "Blade.
What did this do?
On September 22, Nash's partner Master Blaster Iron was replaced by "Blade".
What did he do next?
The reconstituted Master Blasters continued their undefeated streak in October.
What was wrong with this?
The Southern Boys and began to move up the WCW tag team ratings.
However, their winning streak would finally come to an end on November 22.

Question: How did this end his career?
Self-contained rewrite: How did the winning streak ending end Kevin Nash's career?