Send tons of applications to different sponsors with your bodybuilding resume and how you compete...Get a professional to take some pictures of you posing and send those into them...They will see that you have a real resume and a real professional photo showing off your physique...This means no going into the bathroom and taking a shirtless selfie..The more you send the better chance that they will be interested in you...Not as many people are sending in application type resumes and photos as you think...
This paragraph and bolded phrase really stood out to me. I just made a thread about a cool guy named Pete Fields, a former Boxer/Rugby/Football player who they called "Too Tall" because he's almost 7ft. The guy has abs and fantastic looking body, at almost 400 pounds. He has a facebook page, but there aren't any high quality pictures of his physique on the internet. There is hardly any competition for a man of that size and build, maybe 5 other guys on the planet.
Hollywood is always looking for someone that towering and built, because its hard to find someone for fight scenes with someone like the Rock and actually appear to be an overwhelming odd.
Casting directors need to be able to find a man with a quick good search of terms like "towering", and ought to be at least a dozen high quality pictures on social media of the physique they would be potentially putting on screen.