William Daniel Haynes
- Bats Right, Throws Right
- Height 6' 4", Weight 230 lb.
- High School Headland High School (East Point)
- Born October 22, 1949 in Atlanta, GA USA
Dan Haynes was drafted in the 1st round of the 1967 amateur draft dy the Chicago White Sox. The first-baseman was selected by the Kansas City Royals from the White Sox in the 1969 expansion draft and played in the Royals chain through 1974, but never played in the majors.