Otis Spann (March 21, 1924, or 1930 – April 24, 1970 Belzoni,MS) was an American bluesmusician many consider the leading postwar Chicago blues pianist. By age 14, he was playing in bands in the Jackson area. He moved to Chicago in 1946, where Big Maceo Merriweather mentored him. Spann performed solo with the guitarist Morris Pejoe, working a regular spot at the Tic Toc Lounge. Spann was known for his distinctive piano style. He became Muddy Waters‘ piano player in late 1952 and participated in his first recording session with the band on September 24, 1953. He played on many of Waters’ most famous songs, including the blues standards “Hoochie Coochie Man,” “I’m Ready,” and “Got My Mojo Working.” During his tenure with the group, he continued to record as a solo artist and session player with other musicians, including Bo Diddley and Howlin’ Wolf. He stayed with Muddy Waters until 1968.