To answer the question posed on the thread title. In my opinion, theoretically yes, but I don't think Mariusz has the time needed to catch up skill & experience wise. I don't mean Mariusz can't catch up to Brock's "MMA" skills or experience, but his long established wrestling skills and competition experience. Theoretically, yes, realistically, Mariusz is definitely beast enough, but I don't see it happening.
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