He joined the newly formed Toyota Comets in 1973, along with Meralco teammates Alberto Reynoso, Orlando Bauzon, Robert Jaworski and Francis Arnaiz.
Acuña retired from active play after the 1978 PBA All-Filipino Conference and began serving as assistant coach for Toyota.
On December 11 1979, he replaced Dante Silverio as Toyota head coach after Silverio resigned when management decided to reinstate Ramon Fernandez, Ernesto Estrada and Abe King for Game 2 of the ongoing PBA Invitational Conference finals.
During half time, Acuña was fired by team manager Pablo Carlos Jr. for refusing to heed his request to field Robert Jaworski.
The following day, Toyota had a scheduled game against Crispa during the semi-final round of the 1981 PBA Open Conference.