The New York Rangers reported on their website that Vadnais, who spent seven seasons with the team, passed away Sunday. A cause of death was not given.
Vadnais made his NHL debut in 1966-67 with his hometown Montreal Canadiens and played 17 NHL seasons, winning Stanley Cups in 1968 with Montreal and 1972 with Boston. He also played for the California Golden Seals and New Jersey Devils.
Vadnais had 169 goals and 587 points in 1,087 games. He appeared in 106 playoff games with 10 goals and 40 assists.
The Rangers acquired Vadnais along with Phil Esposito in 1975 in one of the biggest trades in NHL history. New York sent Brad Park, Jean Ratelle and Joe Zanussi to the Bruins. Vadnais twice made the All-Star game while a Ranger.
Vadnais is survived by his daughter, Michele, and two grandchildren.