| 1949 | B | Fall River Indians, Lynn Tigers, Manchester Yankees, Nashua Dodgers, Pawtucket Slaters, Portland Pilots, Providence Grays, Springfield Cubs |
| 1948 | B | Fall River Indians, Lynn Red Sox, Manchester Yankees, Nashua Dodgers, Pawtucket Slaters, Portland Pilots, Providence Grays, Springfield Cubs |
| 1947 | B | Fall River Indians, Lawrence Millionaires/Lowell Orphans, Lynn Red Sox, Manchester Giants, Nashua Dodgers, Pawtucket Slaters, Portland Pilots, Providence Chiefs |
| 1946 | B | Fall River Indians, Lawrence Millionaires, Lynn Red Sox, Manchester Giants, Nashua Dodgers, Pawtucket Slaters, Portland Gulls, Providence Chiefs |
| 1933 | B | Attleboro/Lawrence/Woonsocket, Lowell Lauriers, New Bedford Whalers, Quincy Shipbuilders/Nashua Millionaires/Brockton Shoemakers, Taunton Blues, Worcester Chiefs |
| 1930 | B | Lewiston Twins, Lynn Papooses, Manchester Blue Sox, Nashua Millionaires, Portland Mariners, Salem Witches |
| 1929 | B | Brockton Shoemakers, Haverhill Hillies/Fitchburg Wanderers/Gloucester Hillies, Lewiston Twins, Lowell Millers/Nashua Millionaires, Lynn Papooses, Manchester Blue Sox, New Bedford Millmen, Portland Mariners |
| 1928 | B | Attleboro Burros, Brockton Shoemakers, Haverhill Hillies, Lewiston Twins, Lynn Papooses, Manchester Blue Sox, Portland Mariners, Salem Witches |
| 1927 | B | Haverhill Hillies, Lawrence Merry Macks, Lewiston Twins, Lynn Papooses, Manchester Blue Sox, Nashua Millionaires, Portland Eskimos, Salem Witches |
| 1926 | B | Haverhill Hillies, Lawrence Merry Macks, Lewiston Twins, Lowell Highwaymen/Salem Witches, Lynn Papooses, Manchester Blue Sox, Nashua Millionaires, Portland Eskimos |
| 1919 | B | Fitchburg Foxes, Haverhill Climbers, Lawrence Barristers, Lewiston Red Sox, Lowell Grays/Lewiston-Auburn Twins, Portland Blue Sox |
| 1915 | B | Fitchburg Burghers, Lawrence Barristers, Lewiston Cupids, Lowell Grays, Lynn Pirates, Manchester Textiles, Portland Duffs, Worcester Busters |
| 1914 | B | Fitchburg Burghers/Manchester Textiles, Haverhill Hustlers, Lawrence Barristers, Lewiston Cupids, Lowell Grays, Lynn Fighters, Portland Duffs, Worcester Busters |
| 1913 | B | Brockton Shoemakers, Fall River Adopted Sons, Lawrence Barristers, Lowell Grays, Lynn Shoemakers, New Bedford Whalers, Portland Duffs, Worcester Busters |
| 1912 | B | Brockton Shoemakers, Fall River Brienies, Haverhill Hustlers, Lawrence Barristers, Lowell Grays, Lynn Leonardites, New Bedford Whalers, Worcester Busters |
| 1911 | B | Brockton Shoemakers, Fall River Brienies, Haverhill Hustlers, Lawrence Barristers, Lowell Tigers, Lynn Leonardites, New Bedford Whalers, Worcester Busters |
| 1910 | B | Brockton Shoemakers, Fall River Indians, Haverhill Hustlers, Lawrence Colts, Lowell Tigers, Lynn Shoemakers, New Bedford Whalers, Worcester Busters |
| 1909 | B | Brockton Tigers, Fall River Indians, Haverhill Hustlers, Lawrence Colts, Lowell Tigers, Lynn Shoemakers, New Bedford Whalers, Worcester Busters |
| 1908 | B | Brockton Tigers, Fall River Indians, Haverhill Hustlers, Lawrence Colts, Lowell Tigers, Lynn Shoemakers, New Bedford Whalers, Worcester Busters |
| 1907 | B | Brockton Tigers, Fall River Indians, Haverhill Hustlers, Lawrence Colts, Lowell Tigers, Lynn Shoemakers, New Bedford Whalers, Worcester Busters |
| 1906 | B | Fall River Indians, Haverhill Hustlers, Lawrence Colts, Lowell Tigers, Lynn Shoemakers, Manchester Textiles, New Bedford Whalers, Worcester Busters |
| 1905 | B | Concord Marines, Fall River Indians, Haverhill Hustlers, Lowell/Taunton Tigers, Lynn Shoemakers, Manchester/Lawrence Colts, Nashua, New Bedford Whalers |
| 1904 | B | Concord Marines, Fall River Indians, Haverhill Hustlers, Lawrence Colts, Lowell Tigers, Manchester, Nashua, New Bedford Whalers |
| 1903 | B | Brockton/New Bedford Whalers, Concord Marines, Fall River Indians, Haverhill Hustlers, Lawrence Colts, Lowell Tigers, Manchester, Nashua |
| 1902 | B | Concord Marines, Dover, Fall River Indians, Haverhill Hustlers, Lawrence Colts, Lowell Tigers, Manchester, Nashua |
| 1901 | N/A | Augusta, Bangor, Brockton B's, Haverhill Hustlers, Lewiston, Lowell Tigers, Lynn Live Oaks, Manchester,
Nashua, Portland |
| 1898 | B | Brockton Shoemakers, Fall River Indians, New Bedford Whalers/Worcester, Newport Colts, Pawtucket Tigers, Taunton Herrings |
| 1897 | B | Brockton Shoemakers, Fall River Indians, New Bedford Whalers/Browns, Newport Colts, Pawtucket Phenoms, Taunton Herrings |
| 1896 | B | Augusta Kennebecs, Bangor Millionaires, Brockton Shoemakers, Fall River Indians, Lewiston, New Bedford Whalers/Browns, Pawtucket Phenoms, Portland |
| 1895 | B | Augusta Kennebecs, Bangor Millionaires, Brockton Shoemakers, Fall River Indians, Lewiston, New Bedford Whalers, Pawtucket Phenoms, Portland |
| 1894 | B | Bangor Millionaires, Brockton Shoemakers, Fall River Indians, Haverhill, Lewiston, Pawtucket Maroons, Portland, Worcester |
| 1893 | N/A | Brockton Shoemakers, Dover, Fall River Indians, Lewiston, Lowell/Manchester/Boston Reds, Portland |
| 1892 | B | Brockton Shoemakers, Lewiston, Lowell Lowells, Manchester Gazettes/Lawrence, Pawtucket, Portland, Salem, Woonsocket |
| 1891 | N/A | Lewiston, Lowell Lowells, Lynn, Manchester Amskoegs, Portland, Salem, Woonsocket, Worcester |
| 1890 | N/A | |
| 1888 | N/A | Lowell Chippies, Lynn Shoemakers, Manchester Maroons, Portland, Portsmouth Lillies, Salem Witches, Worcester Grays |
| 1887 | N/A | Boston Blues/Haverhill, Haverhill, Lawrence/Salem, Lowell Magicians, Lynn Lions, Manchester Farmers, Portland, Salem Fairies |
| 1886 | N/A | Boston Blues, Brockton, Haverhill, Lawrence, Lynn/Newburyport Clamdiggers, Portland |
| 1885 | N/A | |
| 1877 | N/A | Fall River Casscade, Lowell Ladies Men, Lynn Live Oaks, Manchester Reds, Rhode Islands |
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