After the Tyson-Orlin Norris bout the Nevada commission told Tyson to "take his show on the road" literaly! After being almost disqualified for hitting Norris when he was down and all the other things Tyson pulled over the years they didn't want him to fight there any more.
Now it also possible with Tyson being so far past his best years they didn't want it but I believe that first reason was the main issue.
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