Santiago "Sonny" Cabatu Sr. (born on October 10, 1960 in Cabugao, Ilocos Sur, Philippines), is a retired Filipino professional basketball player in the Philippine Basketball Association and was the very first draft pick of the league in 1985. He is also the father of current Philippine Patriots player Junjun Cabatu. He also played from the Cagayan de Oro Nuggets in the Metropolitan Basketball Association.