From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Christopher Owen Ayres (born May 16, 1965 in Richmond, Virginia) is an American voice actor best known for voicing anime characters. Chris is the brother of Greg Ayres. Unlike Greg though, Chris has had more experience in terms of directing and writing and has even directed theatre productions.
Occasionally his surname is listed as Ayers instead of Ayres, however, this spelling is incorrect as his legal name is "Christopher Ayres".