In early 1968, Norris suffered the tenth and final loss of his career, losing an upset decision to Louis Delgado. On November 24, 1968, he avenged his defeat to Delgado and by doing so won the Professional Middleweight Karate champion title, which he then held for six consecutive years. On April 1, Norris successfully defended his All-American Karate Championship title, in a round-robin tournament, at the Karate tournament of champions of North America. Again that year, Norris won for the second time the All-American Karate Championship. It was the last time Norris participated and retired undefeated. While competing, Norris met Bruce Lee, who at the time was known for the TV series The Green Hornet. They developed a friendship, as well as a training and working relationship.
In early 1968, Norris suffered the tenth and final loss of his career, losing an upset decision to Louis Delgado. On November 24, 1968, he avenged his defeat to Delgado and by doing so won the Professional Middleweight Karate champion title, which he then held for six consecutive years. On April 1 Norris successfully defended his All-American Karate Championship title, in a round-robin tournament, at the Karate tournament of champions of North America. Again that year, Norris won for the second time the All-American Karate Championship. It was the last time Norris participated and retired undefeated. While competing, Norris met Bruce Lee, who at the time was known for the TV series The Green Hornet. They developed a friendship, as well as a training and working relationship.