Albert J. Jackson Jr. (November 27, 1935 – October 1, 1975) was an American drummer, producer, and songwriter. He was a founding member of Booker T. & the M.G.'s, a group of session musicians who worked for Stax Records and produced their own instrumentals. Jackson was affectionately dubbed "The Human Timekeeper" for his drumming ability. He was inducted into the Memphis Music Hall of Fame in 2015, and the Rock and Roll Hall of Fame as a member of Booker T. & the M.G.'s in 1992.