If he retires after losing to Khabib. He will be remembered as a fighter with a style that only worked against lighther, smaller, shorther opponents. Thats why he was successful at 145 but not even close to GOAT 145 since he never defended the belt. At his natural weight his record will be 1-1 or 1-2 (if you count the 1st diaz fight as LW). Either way thats a pathetic record. And his only win against a little bigger and longer opponent a very tough rematch fight winning via decision against a 19-11 fighter who got beat rather easily by other lightweights.