At Maryland, Urso earned first team All-American honors in 1973, 1974, 1975 and 1976. He is one of only four players in the history of intercollegiate lacrosse to have accomplished this. Urso played midfield for the Terrapins, winning the NCAA Division I National Championship in 1973 and 1975. He was a member of Maryland's Atlantic Coast Conference Championship teams of 1973, 1974 and 1976. Urso won the William P. Cole, III Memorial Trophy as Maryland's Most Valuble Player, and still holds the record for goals by a Maryland midfielder with 127. Urso received the McLaughlin Award as the Outstanding Midfielder in Division I in 1974, 1975 and 1976. In 1975, Urso received the Lt. Raymond Enners Memorial Award as the Outstanding Player in Division I. In 1976, he represented Maryland in the North/South Collegiate All-Star game.
Urso played for the U.S. Team which won the 1974 World Championship in Melbourne, Australia. After graduating from Maryland, Urso played for the McGarvey's Lacrosse Club and the Maryland Lacrosse Club. In 1979, he was the head coach for McGarvey's Lacrosse Club. In 1987, Urso was an assistant coach to the Washington Wave Indoor Lacrosse Team.
Urso was elected to the Long Island Metro Lacrosse Hall of Fame in 1991. He was elected to the National Lacrosse Hall of Fame in his first year of eligibility.