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BostonBruins.com - As we mark the 72nd birthday of Bruins legend Bobby Orr, take a look through some of the best photos of No. 4.

1963 | Oshawa, Ontario

Orr, just 15 years old, debuts with the Oshawa Generals of the OHA.

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1966 | Boston

Orr, wearing his original No. 27 sweater, chats with Bruins coach Harry Sinden before a game during his rookie season in 1966-67.

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1968 | Boston

Orr, who potted 21 goals and notched 64 points in 67 games during the 1968-69 season, skates with the puck as he begins a rush up ice from behind the Bruins net.

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January 20, 1970 | St. Louis

Orr skates alongside teammate Johnny Bucyk in the 1970 NHL All-Star Game at St. Louis Arena, one of eight All-Star Games in the blue liner's career.

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March 22, 1970 | Boston

Orr marks his 78th assist of the season, while Bucyk celebrates his 300th goal with the Bruins and goalie Ed Johnston a 5-0 shutout of the Minnesota North Stars.

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May 10, 1970 | Boston

Orr soars through the air after lifting the Bruins to an overtime victory and a four-game sweep of the St. Louis Blues in the 1970 Stanley Cup Final. The iconic sports moment clinched Boston's first Stanley Cup title since 1941.

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Orr celebrates following the Bruins' Stanley Cup championship.

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Orr poses for a celebratory photo with general manager Milt Schmidt, assistant general manager Tom Johnson, and Sinden.

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January 9, 1979 | Boston

Orr is greeted by an eight-minute standing ovation as he makes his way to the ice ahead of his No. 4 retirement ceremony at Boston Garden.

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With encouragement from the crowd, Orr - then a member of the Chicago Blackhawks - puts on his No. 4 sweater.

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September 26, 2007 | Plymouth, Mass.

Orr poses for a photo with fellow Bruins legends Bucyk, Ray Bourque, Schmidt, and Cam Neely during the Boston Bruins Foundation Golf Tournament at Pinehills Golf Club.

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December 18, 2009 | Boston

Orr and Schmidt pose for a photo at Fenway Park ahead of an alumni skate celebrating the 2010 NHL Winter Classic.

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Orr and Neely make their way out to the rink.

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Orr stands behind the bench at Fenway during the alumni skate.

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January 1, 2010 | Boston

Orr waves to the Fenway Park crowd ahead of the 2010 Winter Classic.

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May 10, 2010 | Boston

On the 40th anniversary of his iconic Stanley Cup-winning goal, Orr speaks after his statue is revealed outside of TD Garden.

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October 28, 2010 | Boston

Orr and Schmidt pose for a photo ahead of Milt Schmidt Night at TD Garden.

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June 8, 2011 | Boston

Orr serves as honorary fan banner captain ahead of Game 4 of the 2011 Stanley Cup Final between the Bruins and Vancouver Canucks at TD Garden.

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October 6, 2011 | Boston

Orr makes his way through the 2011 Stanley Cup champions ahead of the team's banner raising ceremony at TD Garden.

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October 20, 2016 | Boston

Orr shares a laugh with Schmidt and Bruins alternate captain Patrice Bergeron as he walks off the ice following a ceremony marking the 50th anniversary of his NHL debut and the 80th anniversary of Schmidt's debut.

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January 27, 2017 | Los Angeles

Orr is named to the NHL 100 team during the league's centennial celebration at the 2017 All-Star Game at the Microsoft Theater.

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May 2, 2018 | Boston

Orr and Red Sox legend Pedro Martinez cheer during Game 3 of the Bruins' second-round playoff series against the Tampa Bay Lightning at TD Garden.

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October 24, 2018 | Boston

Orr greets Red Sox legend David Ortiz ahead of Game 2 of the 2018 World Series between the Sox and Los Angeles Dodgers at Fenway Park.

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May 9, 2019 | Boston

Orr, still an avid supporter of the Black & Gold, smiles during Game 1 of the Eastern Conference Final against the Carolina Hurricanes at TD Garden.

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BY THE NUMERS

1

Orr is the only defensemen in NHL history to win the Art Ross Trophy as the league's leading scorer, doing so in 1969-70 and 1974-75.

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4

Orr is the only player in NHL history to win the Norris Trophy, Art Ross Trophy, Hart Trophy, and Conn Smythe Trophy in a single season (1969-70). Capitals forward Alex Ovechkin is the only other player in league history to win four major awards in the same season.

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6

Orr reached the 100-point mark six times in his career, the most among defensemen in NHL history.

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8

Orr won eight (consecutive) Norris Trophies as the NHL's best defenseman, the most all-time.

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11

Orr is one of 11 Bruins to have his number retired, joining Eddie Shore, Lionel Hitchman, Dit Clapper, Phil Esposito, Neely, Bucyk, Schmidt, Rick Middleton, Terry O'Reilly, and Bourque.

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30 | 40

Orr was the first defenseman in NHL history to score 30 goals in a season in 1969-70 and the first to score 40 goals in a season in 1974-75.

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100

Orr became the first player in NHL history to notch 100 assists in a season in 1970-71.

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124

Orr set the record for plus-minus rating with a plus-124 in 1970-71.

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139

Orr holds the record for most points in season by a defenseman with 139 in 1970-71.

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