Gonzaga was incredible. A 260lbs heavyweight, 15 yrs younger, could knock his head off standing and was as well versed on teh ground as anyone other than Werdum anda couple of others. Randy had some sort of advantage with his experience of fighting in the clinch and just totally controlled the fight from there. Amazing.
Given his age, I think every fight has been a defining fight in some way or another. Much like Hopkins in boxing.