As of 2015, the Bruins have retired jersey numbers two, three, four, five and seven, representing Eddie Shore, Lionel Hitchman, Bobby Orr, Dit Clapper and Phil Esposito. Also retired are numbers nine, 15, 24 and 77, for Cam Neely, Johnny Bucyk, Milt Schmidt, Terry O'Reilly and Ray Bourque.
Wayne Gretzky's number, 99, is retired by all 30 NHL teams.
Hitchman became the first Bruin to have his number retired in 1934, the product of 10 standout years with the club where he was regarded as one of the premier defenseman of his days. Hitchman teamed with Shore to lead the club to the 1929 Stanley Cup title and was only the second NHL player to have his jersey retired.
Widely considered one of the greatest defenseman to ever play the game, Hall-of-Famer Bobby Orr suited up for the franchise from the 1966-1967 season through the 1975-1976 season, leading the club to NHL titles in the 1969-1970 and 1971-1972 seasons. The seven-time all-star led the NHL in assists five times and twice led the league in total points before his jersey was retired by the team in 1979.
Esposito spent nine of 18 seasons with the Bruins, including the 1970-71 campaign where he recorded a then-record 152 points, later broken by Gretzky's 215 in the 1985-86 season. At the time of his retirement following the 1980-81 season, the center trailed only Gordie Howe in career goals and assists. Phil's younger brother Tony is the former Canadiens' and Blackhawks' goaltender and a fellow Hall-of-Famer.