At age 10, his mother enrolled him and his sister in a community theater group, which started his interest in performing.

In 1943 after graduating from Lincoln Park High School, where he was known by the family nickname "Buddy", Lyn joined the navy.

[1] Ten days before graduation, he got his big break cast as "Cadet Happy" on Space Patrol.

[2][1] After Space Patrol, he appeared in several TV and film projects, such as The Amazing Colossal Man, The Adventures of Jim Bowie and Rod Serling's acclaimed Requiem for a Heavyweight episode of Playhouse 90.

His most memorable appearance was in 1957's Invasion of the Saucer Men, playing the role of Artie, also the narrator of the film.