Mario Petri, stage name of Mario Pezzetta, was an Italian operatic bass-baritone and actor.
He made his debut in 1947 and the following year he made his debut at La Scala in Milan with Stravinsky's Oedipus rex; on this occasion he assumed the stage name with which it is known.
The repertoire was mainly addressed to Mozart (Don Giovanni, Le nozze di Figaro), Rossini (L'italiana in Algeri, Cinderella, Semiramide, Moses in Egypt), as well as various Verdi titles. An important physical prowess such as vocal made him particularly famous for the character of Don Giovanni, while another of the parts for which he is most remembered is Arkel in Pelléas et Mélisande. Among the roles as baritone are Macbeth, The Marquis of Posa, Jack Rance.