Jack Mercer, American animator, screenwriter, voice actor, and singer (b. 1910)
Winfield B. Mercer (January 31, 1910 – December 7, 1984), professionally known as Jack Mercer, was a prolific American voice actor, animator and TV screenwriter. He is best known as the voice of cartoon characters Popeye the Sailor Man and Felix the Cat. The son of vaudeville and Broadway performers, he also performed on the vaudeville and legitimate stages.

Mercer provided numerous supporting voices in Superman 1941-1942.