Petrus Theodorus Tromp
Piet Tromp was a baseball official. He was treasurer of the 1978 Haarlem Baseball Week then became president of the Haarlem Baseball Week from 1980-1984. He also led the committee for the 1986 Amateur World Series. During his time running the Haarlem Baseball Week, Team Canada and the Taiwanese national team made their tournament debuts.
Source: Obituary by Marco Stoovelaar