The majority of his acting roles have been on television. He had a recurring role on "All in the Family" as a helper at Archie's bar. In 1973, he appeared in the Hawaii Five-0 episode "A Bullet for El Diablo". In 1974, he appeared in an episode of the short-lived ABC police drama "Nakia". In 1976, he played a novice bullfighter in the "Columbo" episode, "A Matter of Honor". Martinez appeared as Tranquilino Marquez in three episodes of the mini-series, "Centennial" in 1979. In 1979 episode of Quincy, episode " Walk Softly Through the Night".