Butkus the dog is credited as "Butkus Stallone".
The film opens with the title of the film scrolling from right to left underscored by music. However, instead of just doing the opening credits for the cast, Rocky is shown boxing. The rest of the credits appear later as Rocky is shown walking down a street, and this time there is nothing underscoring the credits.
Actor Arnold Johnson is credited ('featuring') in opening credits but not in the closing credits.