In 2021-22 with Winnipeg, Beaulieu earned four assists (0-4=4) in 24 games. He was placed on long-term injured reserve Mar. 9, and did not appear in a game the remainder of the season. He was acquired by Pittsburgh Mar. 21 but did not represent the Penguins.
The 6-2, 200-pound defenseman set single-season career highs in 2016-17 with Montreal, including goals (4), assists (24), points (28), power-play goals (2), power-play points (12), hits (65), blocked shots (102) and appearances (74). He has also appeared in 21 career Stanley Cup Playoff games, collecting five assists.
Originally selected by Montreal in the first round (17th overall) of the 2011 NHL Draft, Beaulieu appeared in four seasons with the Saint John Sea Dogs of the Quebec Major Junior Hockey League (QMJHL) from 2008-12. He registered 37-115=152 points with a +124 rating in 233 career QMJHL games while helping Saint John to QMJHL and Memorial Cup championships in 2011. He was named to the Memorial Cup All-Star Team after scoring 1-6=7 points in eight games.
The Strathroy, Ontario native helped Canada to a bronze medal at the 2012 World Junior Championship, collecting one assist in six games.