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.
DET 3
STL 4
Champ
STL
1930 NNL1 Champion St. Louis Stars
z: best record, c: conference winner, y: division winner, w: wildcard, x: clinched playoff spot
Pennant was decided via a split-season schedule with the winner of the first half of the season playing the winner of the second half of the season, unless one team won both halves

League Pennant

Best of 7-game series
Date    OpponentResultScoreSeries
???at St. LouisL  -0 0-1
???at St. LouisL  -0 0-2
???vs St. LouisW  0- 1-2
???vs St. LouisW  0- 2-2
???vs St. LouisW  0- 3-2
???at St. LouisL  -0 3-3
???at St. LouisL  -0 3-4