Yes, Fitz has the potential to drop Norton, and he didn't just rollover when 37 and 39 against Jeffries, who had a far better chin than Kenny.
Norton had exceptional physical advantages .. taller, huge reach advantage, huge strength advantage and could be a very fast starter .. Fitz's only shot would be to catch him early like Garcia did which is always a possibility ..
Kenny was 207lbs to Garcia's 188lbs, so its not beyond the realms of possibility that Fitz could land something big early.imo.
Maybe he learned to better protect it from light heavies. Still, tho, he lacked gumption and chutzpah.