Jack Grinnage

Jack Grinnage is an American actor with a film and television career spanning seven decades. Born in Los Angeles, Grinnage made his first television appearances in 1954. The following year, he played Moose – one of three teenage rebels who chase James Dean – in Rebel Without a Cause. Rebel Without a Cause was his first film where he received a screen credit.
Grinnage continued to play supporting roles or bit parts in films like King Creole with Elvis Presley, Spartacus and The Private Navy of Sgt. O'Farrell. He also played an errant but sympathetic boy in the Twilight Zone (1959 TV series)|Twilight Zone] episode “The Mind and the Matter”. In 1961, he appeared in the Broadway musical The Billy Barnes People. Between 1974 and 1975, he had a supporting role as Independent News Service reporter Ron Updyke in the mystery series Kolchak: [The Night Stalker]. In 2009, Grinnage played the role of Marvell, the replacement janitor, in two episodes of Scrubs, “My Jerks” and “My Happy Place”, both of which aired in season 8. His most recent credit is the television series The [Kids Are Alright (TV series)|The Kids Are Alright].