Francis Joseph Julian "Muggsy" Spanier (November 9, 1901 – February 12, 1967) was a prominent cornet player based in Chicago. He was renowned as the best trumpet/cornet player in Chicago until Bix Beiderbecke entered the scene. Muggsy led several traditional, "hot" jazz bands, most notably Muggsy Spanier And His Ragtime Band (which did not, in fact, play ragtime but, rather, "hot jazz" that would now be called Dixieland).

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