[1] Clark was born in Buffalo, New York, the son of Afro (née Karahos) and Matthew Mardirosian.

He played Mr. Belding in the original pilot of the series Good Morning, Miss Bliss but was subsequently replaced by Dennis Haskins.

Clark also appeared on two episodes of M*A*S*H, once as Hawkeye's college buddy, a Navy doctor on board an aircraft carrier off the Korean coast.

Later Clark played another Benjamin Pierce who came to the 4077th to retrieve mail that Hawkeye had received in an Army mixup.

In 1995, he had a guest appearance on the sitcom Full House as DJ Tanner's (Candace Cameron-Bure) high school principal, Mr. Robolard, in the eighth-season episode "Up on the Roof".