A power forward, Benaček played 20 seasons in Yugoslavia, Greece, Slovenia, and the Czech Republic between 1975 and 1996.

[3] Benaček was a member of the Yugoslavia national team, alongside Krešimir Ćosić, Dragan Kićanović, Dražen Dalipagić and Mirza Delibašić, that won the silver medal at the EuroBasket 1981 held in Czechoslovakia.

In 1999, he was named an assistant coach for Slovenian club Helios Domžale.

In 2004, he was named the head coach for Apollon Limassol of the Cyprus Division A.

In July 2008, Benaček came back to the Czech Republic, becoming the head coach for Kolín.