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A wrestling match between a top-15 UFC heavyweight and a man with no legs? It might sound like a crazy concept ... but it's gonna be reality when Zion Clark looks to take down Valter Walker next month in Miami ... and Clark tells TMZ Sports he's gonna choke Walker out "like a boss!"
We chopped it up with Clark -- who was born without legs -- and, he is confident as ever heading into his showdown with Walker, the brother of UFC light heavyweight Johnny Walker.