Joseph Leslie Sample (February 1, 1939 – September 12, 2014) was an American pianist, keyboard player, and composer. He was one of the founding members of the Jazz Crusaders, the band which became simply the Crusaders in 1971, and remained a part of the group until its final album in 1991 (not including the 2003 reunion album Rural Renewal).

Beginning in the 1970s, he enjoyed a successful solo career and guested on many recordings by other performers and groups, including Miles Davis, George Benson, Jimmy Witherspoon, B. B. King, Eric Clapton, Steely Dan, Joni Mitchell, Anita Baker, and the Supremes. Sample incorporated jazz, gospel, blues, Latin, and classical forms into his music.

Sample was born in Houston, Texas, on February 1, 1939. Sample began to play the piano at age 5. He was a student of the organist and pianist Curtis Mayo.

In high school in the 1950s, Sample teamed up with friends saxophonist Wilton Felder and drummer “Stix” Hooper to form a group called the Swingsters. While studying piano at Texas Southern University, Sample met and added trombonist Wayne Henderson and several other players to the Swingsters, which became the Modern Jazz Sextet and then the Jazz Crusaders, in emulation of one of the leading progressive jazz bands of the day, Art Blakey‘s Jazz Messengers. Sample never took a degree from the university; instead, in 1960, he and the Jazz Crusaders made the move from Houston to Los Angeles. He was a member of Phi Beta Sigma fraternity.