Well if Usyk gets stripped, its because he isn't fighting Parker. So why would Parker defend vs Usyk when Usyk isn't interested in him?
If you remember Usyk got stripped and Dubois became IBF champ and then defended his belt against Usyk.
Itauma is the number 1 ranked contender with the WBO somehow after beating McKean and Balogun. Absolute insanity he is already the mandatory.