The 12th season of the Cuban National Series saw Industriales win its fifth championship, outdistancing Habana and two-time defending champion Azucareros. The league expanded from 12 to 14 teams, with the addition of Constructores and Serranos, and increased the season length from 66 to 78 games.
"Cronología: 1973" (in Spanish). Archived from the original on February 25, 2005. Retrieved 2006-10-05. (Note - text is printed in a white font on a white background, depending on browser used.)