Joseph Gilbert Yvon Jean Ratelle (born October 3, 1940) is a former Canadian ice hockey player who played for the New York Rangers and Boston Bruins. In twenty-one seasons he averaged almost a point a game and won the Lady Byng Trophy twice in recognition of his great sportsmanship. He was inducted into the Hockey Hall of Fame in 1985. In 2017 he was named one of the "100 Greatest NHL Players" in history.

Ratelle's hockey career almost ended at age 23 when he suffered a serious back injury and had to undergo major spinal cord surgery. He recovered to become a regular with the Rangers from 1963 to 1975. His greatest success came with linemates Vic Hadfield and Rod Gilbert in the "GAG Line" (i.e. Goal-a-Game Line). He led the Rangers in scoring between 1968 and 1973 when the team was a powerhouse among the league's best. Ratelle was poised to beat out Boston Bruins' legend Phil Esposito for the scoring title in 1972 when he had to sit out fifteen games due to an injury, but came back for the Stanley Cup finals against Boston to lead his team.

Only three other players - Esposito, Bobby Orr and Johnny Bucyk - had scored as many points in any season as Ratelle had done in his shortened season. His 109 points that season remained a Rangers' scoring record until 2006, when Jaromír Jágr broke it. In November 1975, Ratelle was traded with Brad Park and Joe Zanussi to the Boston Bruins for Esposito and Carol Vadnais. Rangers general manager Emile Francis made the trade out in part out of respect so that Ratelle did not have to relocate his family far, plus the Bruins had sought Ratelle's skills at center.[2] With the Bruins for the remainder of the 1975-76 season, Ratelle scored over 100 points that season for the second time in his career.

He played five more seasons with Boston, gaining admiration for his slick passing, skill at faceoffs and all-around excellent play. Ratelle's rookie trading card At the time of his retirement after the 1980-81 season, Ratelle was the league's sixth all-time leading scorer. While he never played on a team that won the Stanley Cup (being a finalist in 1972, 1977, and 1978), he was a member of the 1972 Team Canada squad that defeated the Soviet Union in the first Summit Series. He was well known as a gentlemanly player, finishing in the top five for the Lady Byng Memorial Trophy for sportsmanship and excellence nine times, including a stretch between the 1970 and 1978 seasons where he was in the top-three six times and won the trophy twice.