Stallone later explained that he had done the film out of desperation after being evicted from his apartment and finding himself homeless for several days.
Stallone took odd jobs around this time, including being a cleaner at a zoo, and a movie theater usher; he was fired from the latter for scalping tickets.
On March 24, 1975, Stallone saw the Muhammad Ali vs. Chuck Wepner fight. That night Stallone went home, and after three days he had completed the first draft of Rocky.