[2] Mariucci's best season with the Black Hawks came in 1946–47 when he played in 52 of the team's 60 games and finished with 9 goals and 11 assists and his 110 penalty minutes were second in the league to Gus Mortson.

After one season in St. Louis, on September 4, 1949, Mariucci was traded to the Minneapolis Millers in the United States Hockey League (USHL), again for cash.

After his professional playing career ended, Mariucci became the head coach of the Minnesota Golden Gophers hockey team.

Mariucci's best Gopher team came in 1953–54 when Minnesota would advance all the way to the NCAA finals before losing to Rensselaer Polytechnic Institute, 5–4 in overtime.

He eventually worked for Lou Nanne, one of his Gopher Hockey players, and held the position with the North Stars until his death in 1987.

He returned to the international scene as the head coach of the United States team at the 1976 and 1977 Ice Hockey World Championships.