Sweeney was born in Concord, Massachusetts, but grew up in Boxborough, Massachusetts. As a youth, he played in the 1976 Quebec International Pee-Wee Hockey Tournament with a minor ice hockey team from Assabet Valley.
Sweeney was born in Concord, Massachusetts, and spent his formative years in Boxborough, Massachusetts. As a young player, he participated in the 1976 Quebec International Pee-Wee Hockey Tournament with an ice hockey team from Assabet Valley.