Pastore competed in both indoor track and field and outdoor track and field at Xaverian High School in Westwood, Mass. After receiving the Most Improved award in his sophomore season, he earned the Coaches Award in his senior year as well as All-Catholic Conference honors. He was part of the long jump relay state champion squad, setting a meet and state record in that event.
Born in Erlanger, Kent., Pastore is the son of Anthony Pastore. He has a younger sibling. He is majoring in nursing.