Steven John Dunning
- Bats Right, Throws Right
- Height 6' 2", Weight 205 lb.
- School Stanford University
- High School University High School (San Diego)
- Debut June 14, 1970
- Final Game September 30, 1977
- Born May 15, 1949 in Denver, CO USA
Steve Dunning was the last American League pitcher to hit a grand slam before the introduction of the Designated Hitter. He did it May 11, 1971. The next such grand slam was by Felix Hernandez on June 23, 2008.