The NNL split the season into two halves. St. Louis won the first half, Detroit won the second half. The teams met at the end of the season in a best-of-7 playoff series to determine the Champion.
The 1930 St. Louis Stars, managed by John Reese, won the League Pennant after finishing the NNL1 regular season in 1st place with a 69-25-1 record.