Scott Harrison is a big lad at the weight he boxes - but as has been said he isnt a puncher, maybe Wayne McCullough's quote was referring to actual strength in the clinch and in general, it has been many times that although big, Harrison is not heavy handed.
As has also been said on the thread, Arthur has a very questionable chin (ala Gomez) and the more he battles to lose the weight, the more open he is to being stopped by a "non puncher". Arthur's problem is that if he moves up a weight, he too isnt regarded as a puncher, which will see no effect at a higher weight.
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