Technically he has just a single top 5 win.At WW?
Also, he arguably (not my contention; but you'll find plenty of people who will argue that here) getting the nod from the judges.
IMO, still a better case for a title shot than Islam had.
Usman was top 5 at 170 but they fought at 185 where he isn't ranked. On a week's notice.
You don't get a top 5 win if you fight outside of the weightclass they're ranked in.
Jon Jones wouldn't get a top 5 win if he dragged O'Malley up to heavyweight and beat him.