Jeff Leach was the voice actor behind the Ghost character in Modern Warfare 2019 and Warzone. The entire original Modern Warfare cast was re-casted for the 2019 reboot, and Leach voiced Ghost when the character was added as an operator in Season 2 in February 2020.
Source: N4G PC Activision cuts ties with voice actor of Ghost, Jeff Leach, after sexist comments resurface