He completed his high school at the Northwestern Agusan College but it was at the University of San Jose–Recoletos where he got hooked into basketball under coach Yayoy Alcoseba.

Realubit's performance earned him a berth for the all-pro Philippine team to the 1990 Asian Games as a replacement for Jerry Codiñera.

His stint with Swift was highly successful, culminating in Realubit winning three championships with the team, and playing there for six years.

During the 2000 Governors' Cup, Realubit was traded to the Tanduay Rhum Masters in exchange for two second-round picks.

[4] In his debut with Tanduay, he made the game-winning follow-up basket in their match against the defending champions San Miguel Beermen.