Dallas Smith was known as a defensive defenceman who almost didn't get his chance to play in the NHL. He made his NHL debut with the Boston Bruins playing five games in the 1959-60 season. The next year saw him stay with the team for the whole season before spending the majority of the 1961-62 season in the minors. For three more seasons Smith could not break into the Bruins lineup despite its having rough years.
After two stints with the team in 1965-66 and 1966-67, Smith finally joined the Bruins just as they were on the way up. Bobby Orr joined Smith on the blueline and led the team to Stanley Cup championships in both 1969-70 and 1971-72.
After thinking he would never make it back to the NHL, Smith was a key member to a Bruins team that everyone feared to play. He appeared in the All-Star Game in four straight years from 1971 to 1974 and was the NHL plus/minus leader for the 1967-68 season. Smith retired from the Bruins after they lost in the Cup finals in 1977 to the Canadiens but was coaxed back to play for the Rangers the next season by his former teammate, Phil Esposito. Smith later regretted the comeback, having, by his own admission a terrible season, and retired for good in 1978.