DeNucci debuted in the World Wide Wrestling Federation (WWWF) in 1967. On June 18, 1971, DeNucci won his first WWWF title, the WWWF International Tag Team Championship, with Bruno Sammartino by defeating The Mongols (Bepo and Geto Mongol). They lost the title to The Mongols three days later. On May 13, 1975, DeNucci and Victor Rivera won the WWWF World Tag Team Championship from Jimmy and Johnny Valiant. In June, however, Rivera left the WWF, and Pat Barrett became DeNucci's replacement partner. They lost the titles approximately three months later to The Blackjacks on August 26. DeNucci became a two-time WWWF World Tag Team Champion when he and his partner Dino Bravo defeated Professor Tanaka and Mr. Fuji on March 14, 1978. They held the titles until June 26, when they dropped it to The Yukon Lumberjacks. DeNucci also unsuccessfully challenged inaugural WWF Intercontinental Champion Pat Patterson on a number of occasions for the belt in 1979 and 1980. Throughout 1981 and 1982, he became a jobber. He left he company in 1982 after fifteen years.
On November 16, 1987, he returned to the World Wrestling Federation for a one night appearance at a house show in East Rutherford, New Jersey, participating in a Legends Battle Royal won by Lou Thesz.
DeNucci passed away on August 12, 2021.