John Alexander Mantoulis, born 7/27/83, passed away on 4/28/22 at the age of 38. John was a life-long resident of Brockton and a member of the Annunciation Greek Orthodox Church of Brockton. Growing up, John played Little League baseball, soccer, and was involved in his church's youth group and basketball team. He visited Greece with his family many times. A 2001 graduate of Brockton High, John was always proud of his Greek heritage and being from the "City of Champions". John comes from a close-knit family and is survived by his son, his son's mother - both of Worcester, his mother, his sister and brother-in-law and their children, his grandparents, father, many aunts and uncles, cousins, nieces, and nephews. Services will be private. Donations in John's honor can be made to the Annunciation Greek Orthodox Church of Brockton.