Jack DeLeon (December 19, 1924 - October 16, 2006) was an American actor. He is best known for playing Marty Morrison on the television series Barney Miller from 1975 to 1982. His film credits included Linda Lovelace for President (1975), I Wonder Who's Killing Her Now? (1975) and The Choirboys (1977), and he voiced Sergeant Samuel McPherson in the 1977 Dr. Seuss animated television special Halloween Is Grinch Night.