The two-year deal paid $70,000 plus a signing bonus, gave Orr the top salary in hockey.
The Bruins first invested in Orr in 1961 when he was just 13 by sponsoring his youth hockey team.
In his debut season with the Bruins in 1966-1967, Orr scored 13 goals and 28 assists, gaining him the Rookie of the Year honor, as well as second-team All-Star.
Orr was not only respected by the Boston fans because of his play (he received a standing ovation when he scored his first NHL goal), but also for his physical play; his first fight and win were against NHL veteran and tough guy Ted Harris of the Montreal Canadiens.
Orr would go on to win two Stanley Cups with the Bruins and still holds four records: most assists by a defenseman in one season, most assists by a defenseman in one game, most points by a defenseman in one season and best plus-minus in one season with +124.