
Prior to his role as Colt in Way of the Dragon, Norris was known only as a martial artist. Whereas Lee was already in the process of establishing himself as a kung fu star, Norris’s only acting experience at the time was a bit role in The Wrecking Crew. At the time, Norris and Lee were longtime friends who had trained together often.
Later, when Lee was making Way of the Dragon with Golden Harvest in Hong Kong, he contacted Norris and offered him the role of the final villain. Though Norris received little screen time in the movie, the part of Colt laid the groundwork for him to enjoy a long and profitable career in Hollywood.
Chuck Norris Didn’t Want To Make A Second Bruce Lee Movie

Polly wrote in his book that Norris turned down an opportunity to appear in Warner Bros.’ Enter the Dragon. The Bruce Lee biography claims that the martial arts icon later asked Norris to play O’Hara, one of the film’s secondary antagonists.
When Norris declined the part for the reasons described above, Lee said he would give the role to karate expert Robert Wall. Polly noted that Norris supported Lee’s decision to cast Wall in his place.
What Chuck Norris Did After Way of the Dragon

While Norris did eventually establish himself as an action hero, Way of the Dragon wasn’t his last villain role, nor was it the last time his character lost a fight at the end of a movie. Two years after the release of Bruce Lee’s Way of the Dragon, Norris played an evil gangster in Yellow-Faced Tiger.
It wasn’t until his next movie, Breaker! Breaker!, that Norris received his big break. After playing the main protagonist in the film, Chuck Norris followed it up with a string of popular action movies which kept him busy through the rest of the 1970s and much of the 1980s.