Dennis "Denny" Hadican is a retired American soccer forward who played professionally in the North American Soccer League. Hadican attended Saint Louis University, playing on the men's soccer team from 1970 to 1973. During that time, he was part of three NCAA Men's Division I Soccer Championship teams. In 1970, he scored the game-winning goal in a 1-0 win over the UCLA Bruins for the national title. He was inducted into the Billikens Hall of Fame in 2001.In 1974, the Seattle Sounders selected Hadican in the North American Soccer League draft. They then traded him to the St. Louis Stars. He played three games for the Stars in 1975. The Stars then traded him to the Sounders in exchange for a 1976 draft pick. In 2002, the St. Louis Soccer Hall of Fame inducted Hadican.