Rosenzweig was born to a Jewish family in Los Angeles[1] and graduated from Montebello High School in 1955.

He also produced the 1960s series Daniel Boone, as well as a dozen episodes of Charlie's Angels.

[4] He subsequently created and produced The Trials of Rosie O'Neill, which starred his third wife Sharon Gless and ran for two seasons in the early 1990s.

In 1985, he set up The Rosenzweig Company to launch their first TV project Fortune Dane, and received a three-year distribution deal with Columbia Pictures Television.

[1][6] In 1979, Rosenzweig married Barbara Corday, a producer and writer for Cagney & Lacey; they divorced in 1990.