Blues No. 2 is a jazz blues composition by Miles Davis, recorded on March 21, 1961, at Columbia's 30th Street Studio in New York City during sessions for the album Someday My Prince Will Come. The track was not included on the original LP and remained unreleased until it appeared as a bonus track on the 1999 CD reissue, making it one of several Davis outtakes from this period to surface decades after the session. The recording is notable for featuring Philly Joe Jones on drums rather than Jimmy Cobb, who played on the rest of the album. This session marked Jones's final contribution to a Miles Davis recording, closing a partnership that had produced some of the most celebrated rhythm section work in jazz history. The composition follows a standard blues structure with a swing feel, functioning essentially as an improvised head rather than a tightly arranged piece, giving the ensemble room for spontaneous interplay. It sits within Davis's early-1960s hard bop output, a period when he balanced original compositions like Pfrancing, Drad-Dog, and Teo alongside pop standards, a notable contrast to the all-originals modal approach of Kind of Blue two years earlier. Blues No. 2 has never entered the standard jazz repertoire and remains a deep-catalog curiosity, valued primarily for what it documents about the personnel and creative atmosphere of these particular sessions.