At the 1968 Olympics, he won the Men's 200m Breaststroke in front of a wildly cheering crowd.
Muñoz is of Greek descent on his mother's side.
His nickname is "el tibio", which means "lukewarm" in Spanish. It was coined because Felipe's father is from Aguascalientes, meaning "hot waters", and his mother is from the town of Río Frío (Estado de Mexico), meaning "cold river". He also had the odd habit of refusing to swim in an unheated pool.