Michael Joseph O'Sullivan was an American jazz pianist.
Sullivan was the ninth child of Irish immigrant parents. He studied classical piano for 12 years and at age 17, he began to play popular music in silent-movie theaters, on radio stations, and then with the dance orchestras, where he was exposed to jazz. He graduated from the Chicago Conservatory and was an important contributor to the Chicago jazz scene of the 1920s. Sullivan's recording career began towards the end of 1927, when he joined McKenzie and Condon's Chicagoans. Other musicians in his circle included Jimmy McPartland, Frank Teschemacher, Bud Freeman, Jim Lanigan and Gene Krupa. In 1932 he was a member of recording group the Rhythmakers. In 1933, he joined Bing Crosby as his accompanist, recording and making many radio broadcasts.
He contracted tuberculosis in 1936, and while he was convalescing at a sanitarium in Monrovia, California in 1937, Crosby organized and appeared in a five-hour benefit for him at the Pan-Pacific Auditorium in Los Angeles on May 23, 1937 in front of an audience of six thousand.
From Wikipedia (https://en.wikipedia.org/wiki/Joe_Sullivan) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/legalcode)