The heavyset, balding Balsam was a familiar face as a character actor since his career began on Broadway in the early 1940s. After a hiatus to serve in the US Army during WWII, he found work on stage in a number of Broadway productions including "Lamp at Midnight," "Macbeth" and "The Closing Door" and on TV in such varied shows as "Philco Television Playhouse" (NBC), "The Goldbergs" (CBS) and "Captain Video" (ABC). In the 50s and 60s, Balsam continued to appear on stage including appearances on Broadway in two of Tennessee Williams' plays: with Maureen Stapleton and Eli Wallach in "The Rose Tattoo" (1951) and "Camino Real" (1952) as well as a Tony Award-winning turn as three characters in Robert Anderson's comic one-acts "You Know I Can't Hear You When the Water's Running" (1967). Other credits include Bernie Dodd in Clifford Odets' "The Country Girl" (in Easthampton, New York, 1954), Hickey in Eugene O'Neill's "The Iceman Cometh" (in Los Angeles, 1961) and Willie Loman in Arthur Miller's "Death of a Salesman" (in Philadelphia, 1974).