NBL (Nation basketball league in america) formed (jan 11, 1937 – jan 11, 1937)

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The National Basketball League (NBL) was a professional basketball league in the United States made in 1937. After the 1948–49 season, its twelfth, it merged with the Basketball Association of America (BAA) to create the National Basketball Association (NBA). Five current NBA teams trace their history back to the NBL: the Atlanta Hawks, the Detroit Pistons, the Los Angeles Lakers, the Philadelphia 76ers, and the Sacramento Kings.

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