No, RDA was ranked in the top 10 when Fiziev beat him.
Fun fact, that's a respectable bit of information indeed but rankings aren't the end all be all. I dont think very highly of his win over a washed up Cerrone, over James Vick or Edson Barboza to be quite honest. The Johnson win was solid, he was a fringe top 10 guy and Gaethje barely scraped by in that fight. Similarly 36 year old, battle worn Chandler isn't that impressive of a win to me and even Ferguson who was 36 when he lost to Gaethje had taken a lot of damage and been rocked plenty during that win streak...I do personally wonder if he was beginning to age out going into that fight and Gaethje just put the nail in the coffin.
Truthfully Gaethjes wins aren't aging the best and if he loses to Fiziev at 6-5 over 11 fights he'll really cement himself as a "fun fighter" moreso than some kind of perennial top guy/contender in my book. His games pretty flawed and it's what makes him exciting, lands 7.5 strikes a minute and absorbs 7.8....absolutely no defense to his striking so he's always getting hurt and busted up while dishing out maximum punishment himself. His cardio has been consistently bad and gone unfixed, it's a huge reason guys like Poirier, Khabib and Alvarez iced him...he can't keep up, lots of wasted energy and not the best cardio.
If Gaethje beats Fiziev I want to eat all the crow because I've said it before, I think Damir and Guram would beat Gaethje over 15 minutes comfortably. I think Fiziev stops him.