Does anyone see Bryan Russell on-screen in this film?

I don't see him. Imdb.com is the only site listing him in this movie. Most notably, Afi.com does not list him in the cast. There is a photo on the internet of the Disney back lot set up as Hickory that purports to show Kurt Russell and Bryan Russell playing baseball, but since Bryan was under contract with Disney why would they pay him contract rates to play an extra?