Prior to beginning his NHL career with the New York Rangers in 1936–37, Smith played in several minor professional leagues. After splitting his first professional season in 1932–33 with the Springfield Indians of the Canadian-American Hockey League and Saskatoon Crescents of the West Coast Hockey League, Smith moved further west to play for the Vancouver Lions of the North West Hockey League, where he led the league in scoring with 25 goals in his rookie year. He then went on to lead the league in points the next two seasons with 44- and 53-point campaigns. In 1936–37, Smith joined the International-American Hockey League, precursor to the American Hockey League, and finished second in league scoring to Jack Markle with 54 points as a member of the Philadelphia Ramblers. He helped lead his team to the Finals of the inaugural Calder Cup championship, but lost to the Syracuse Stars in four games of what was a five-game series.
New York Rangers (1937–1943)
Smith began his NHL career with the Rangers with a short 2-game stint in, during which he notched his first NHL career goal. He quickly became an integral player on the Rangers roster, leading the team in scoring in his second full NHL season in with 41 points. Going the length of the campaign with just one minor penalty, he was also awarded the Lady Byng Trophy, his first of two in his career. The following season, he helped lead the Rangers to the Stanley Cup championship, defeating the Toronto Maple Leafs in six games. Despite winning the Stanley Cup that year, however, Smith's production began to tail off with the Rangers, scoring only 24 points that championship year. Despite improving to 33 points in, Smith ended his 6-year tenure with the Rangers following that season.
Joining the Chicago Black Hawks in 1943–44, Smith rejuvenated his career playing on a line with future fellow Hockey Hall of Famers, Bill Mosienko and Doug Bentley. He recorded 23 goals and established an NHL record for single-season assists with 49 for an NHL career-high 72 points. The combined total of Mosienko, Bentley and Smith's points that season also set an NHL record for a line with 219. Smith's record-setting season was complemented by a second LadyByng Trophy, having only accumulated 4 penalty minutes. The following season, in 1944–45, Smith succeeded Bentley Smith set another NHL record with a four-goal period against the Montreal Canadiens on March 4, 1945. The remainder of Smith's four-season stay in Chicago was not met with as much offensive success as his initial campaign with the team, but he did, however, record three straight 20-goal seasons, including a personal best 26-goal season in 1945–46. After his production dipped to 26 points in 1946–47, he retired from the NHL.
Coaching in the minors (1947–1952)
Smith returned to the minor leagues in 1947–48, joining the short-lived United States Hockey League with the Tulsa Oilers. He led Tulsa in scoring with 71 points in his only season while also serving as the team's head coach. Finishing in the top ten in league scoring, he won the Herman W. Paterson Cup as league MVP. The following season, he also did double duty playing and coaching in St. Paul Saints, where he played for three seasons. In 1951–52, Smith joined the Cincinnati Mohawks of the AHL, coaching them to the second round of the Calder Cup playoffs and playing in a limited role, appearing in just 2 games. Smith retired following his one-season stint with the Mohawks both as a coach and player.
Retirement
Following Smith's retirement, he returned to Vancouver, where he had competed in the NWHL to play oldtimers hockey. He made his residence there and became a founding member of the British Columbia Hockey Benevolent Association, also known as the Canucks Alumni, and at one point held the position of president. Thirty-nine years following his professional retirement, Smith was inducted into the Hockey Hall of Fame in 1991. At the time of his death on June 15, 2008, Ray Getliffe, a left winger who played for the Boston Bruins and Montreal Canadiens was said to be the oldest living person to have played in the NHL. Later, it was reported that Smith was the oldest living person to have ever played in the NHL. Both these reports, however, overlooked players who had only played a limited number of games, such as Louis Holmes and Al Suomi. Getliffe, who died at the age of 94, was just several months younger than Smith at the time of his death, while Holmes and Suomi were 97 and 95, respectively at that time. On May 19, 2009, Smith died at the age of 95, leaving Suomi as the oldest living NHL player, at the current age of 99. He was the last surviving member of Rangers 1940 Stanley Cup team. In the 2009 book 100 Ranger Greats, the authors ranked Smith at No. 35 all-time of the 901 New York Rangers who had played during the team's first 82 seasons.