Lawrence Thomas Popein (August 11, 1930 – February 7, 2020) was a Canadian professional ice hockey player and coach.

[2] In 1954, Popein's contract was acquired by the New York Rangers and he began his National Hockey League (NHL) career.

Although a relatively small skater at 5 ft 9 in, 170 lbs, Popein developed a reputation as a stoic, fearless, hard-working player who was a solid body checker and a skilled passer.

He briefly returned to the NHL during the 1967–68 season, as expansion allowed many veterans to crack the lineups of fledgling teams, with Popein spending one year with the Oakland Seals.

After a clean sweep of the Vancouver front office, Popein took a job with the Calgary Flames in 1986, serving as a scout until his 1992 retirement.