He competed in the men's 73 kg event at the 2012 Summer Olympics; after defeating Cheung Chi Yip in the second round and Dirk Van Tichelt in the third, he lost to Wang Ki-Chun in the fourth round and was eliminated by Nyam-Ochir Sainjargal in the repechages.

[4] On August 6, 2012, Delpopolo was expelled from the Olympics by the IOC after he tested positive for cannabis.

"[6] On August 9, 2016, Delpopolo competed again at the 2016 Summer Olympics in the men's 73 kg event, defeating Ahmed Goumar (Niger) in the first round, Odbayar Ganbaatar (Mongolia) in the second round, and ultimately losing to Miklós Ungvári (Hungary) in the Quarter-finals by penalty points.

[7] Delpopolo was born as Petar Perović (Montenegrin/Serbian Cyrillic: Петар Перовић) in Nikšić, SR Montenegro, SFR Yugoslavia.

[9] Nick was raised by his adoptive parents in Westfield, New Jersey and attended Bergen Catholic High School.