[3] In 1957 he portrayed the title role in a nationally broadcast performance of Mussorgsky's Boris Godunov with the NBC Opera Theatre.
Tozzi also sang the bass part in the recording of Sir Thomas Beecham's version of Handel's Messiah for RCA Victor in 1959.
After dubbing the singing voice for the character of Emile de Becque (portrayed by Rossano Brazzi) in the 1958 film version of South Pacific, Tozzi spent many years playing the role of de Becque himself in various revivals and road tours of the show, including one at Lincoln Center in the late 1960s.
He served as Distinguished Professor of Voice at Indiana University's Jacobs School of Music from 1991 until he retired in 2006.
[7] Tozzi also acted on television and appeared on several TV shows in the 1970s and 1980s, including The Odd Couple, Baretta, Kojak, and Knight Rider.