The 28th season of the Cuban National Series saw a three-way tie atop the Eastern division, with Granma and Santiago de Cuba advancing to the postseason, along with Industriales and Henequeneros from the Western division. The ensuing round-robin tournament was won by Santiago de Cuba, who won five of their six games. This was the final season with the postseason structured as a round-robin tournament. The 18 teams of the league, each with a 48-game regular-season schedule, was unchanged from recent seasons.
"Cronología: 1989" (in Spanish). Archived from the original on February 26, 2005. Retrieved 2006-10-11. (Note - text is printed in a white font on a white background, depending on browser used.)