Yeah it was reported that Mike Perry will be the replacement, for at least on the original date of July 20.
So this is like a get busy fight for Jake Paul while waiting for Mike Tyson to fully heal and be ready for their fight. It's obvious that Jake has been training already and doesn't want to go back to being lazy again and so he would rather fight in July 20, paid Mike Perry as his opponent and most likely this could be just like a sparring session for Jake.
And he needs to win this fight so that the Mike Tyson clash will still be push. No need for upset from Mike Perry as everything will derail their plans.