Actor. He is best remembered for his portrayal of the no-nonsense Collier in "The Rawhide Trail" (1958). Born Marold Glaspey, he was raised within a traditional working-class family. Following his graduation from the University of Iowa, he served in the United States Army during World War II and upon returning to civilian life following the end of the war, he settled in Shenandoah, Pennsylvania, and began his career as a radio announcer. While attending a social function at the prestigious Beverly Hills Hotel during a venture to California, he was introduced to character actor James Arness. Impressed by his slim physique, dark good looks, and distinctive voice, he befriended him and arranged for him to begin a career in the film industry beginning with him appearing opposite him on an episode of "Gunsmoke". From there, he would go on to flourish as a notable character actor appearing in over 20 features; often typecast as husbands, fathers, relatives, bachelors, businessmen, doctors, blue-collared guys, sergeants, lieutenants, authority figures, bartenders, sidekicks, gamblers, detectives, reporters, policemen, city slickers, politicians, mechanics, chiefs, jurors, and patriarchs. He appeared in such feature films as "The Young Guns" (1956), "Gun Battle at Monterey" (1957), "Hell's Five Hours" (1958), and "The Gun Fight at Dodge City" (1959). On television, he appeared in various guest spots on such syndicated sitcoms as "Death Valley Days," "Tombstone Territory," "Sergeant Preston of the Yukon," "Bat Masterson," "Harbor Command," "Cimarron City," "The Life and Legend of Wyatt Earp," "Bonanza," "Outlaws," "Frontier Circus," "The Barbara Stanwyck Show," "The Deputy," "The Rogues," and "Tales of Wells Fargo". During his career, he was a member of the Screen Actors Guild, had been supportive of the Motion Picture and Television Fund, had been a member of the Hollywood Republican Committee, was a regular parishioner of the Catholic church, presided on his local charters of the American Red Cross and the Boys & Girls Clubs, was a theatrical instructor for the Pasadena Playhouse, had been a certified deputy, and was a celebrity spokesman for Maxwell House Coffee and BIC Ballpoint Pens. Following his 1964 retirement, Warren, who never married nor had any children, relocated back to his native Iowa and spent the remainder of his life ranching and being involved in charitable and religious ventures, until his death from the complications of undisclosed causes.