Sylvester Stallone's character Caddo insists that his partner, played by Chuck Connors, call him "Rocky". The air date here was September 1975. Stallone appeared the following year as the tile character in Rocky (1976).
Not only does the episode feature a pre-Rocky Sylvester Stallone, it has Daniel J. Travanti, the future Lt Frank Furillo of Hill Street Blues as an automobile break-in perpetrator.