Marchand's game is a combination of competitiveness, energy and ability. He was named the 27th captain in the history of the Boston Bruins at the age of 35 on Sept. 20, 2023, played for Canada at the 4 Nations Face-Off and gave everything he had to the Bruins for 16 seasons, including a Stanley Cup championship as a rookie.

It was the end of an era when the Bruins traded Marchand to the Florida Panthers on March 7, 2025, for a conditional second-round pick in the NHL Draft. He had 20 points (10 goals, 10 assists) in the Stanley Cup Playoffs, including six goals in the Stanley Cup Final, two of which were game-winners, to win the Cup for the second time. At age 37, Marchand scored six goals in the Final against the Edmonton Oilers, the most ever by a player 35 years old or older in the championship round and by anyone since Oilers forward Esa Tikkanen scored six in 1988.

Marchand signed a six-year contract with the Panthers on July 1, 2025. He had two assists in a 6-3 win against the Washington Capitals at Amerant Bank Arena on Nov. 13 to become the 102nd player in NHL history to reach 1,000 points. He helped Team Canada win silver at the Olympic Winter Games Milano Cortina 2026.

The feisty left wing has carved a notable NHL career out of a confrontational game of cat and mouse. His "Little Ball of Hate" nickname (inherited from Pat Verbeek) is well earned. When the Bruins visited the White House on Jan. 23, 2012, to commemorate their 2011 Stanley Cup championship, even U.S. President Barack Obama was curious.

"What's up with that nickname, man?" Obama, a Chicago Blackhawks fan, asked Marchand.

A native of Halifax, Nova Scotia, Marchand was selected by Boston in the third round (No. 71) of the 2006 NHL Draft after he had 66 points (29 goals, 37 assists) in 68 games for Moncton of the Quebec Major Junior Hockey League.

The following season, Marchand helped Val-d'Or advance to the QMJHL final by scoring 40 points (16 goals, 24 assists) in 20 postseason games.

Marchand split the 2007-08 season between Val-d'Or and Halifax of the QMJHL before turning professional to play for Providence of the American Hockey League.

Early in the 2009-10 season, Marchand was called up by the Bruins and had an assist in his NHL debut, a 3-2 victory against the Nashville Predators on Oct. 21, 2009. It was his only point in 20 games with Boston.

Marchand's first full season came in 2010-11, when he helped the Bruins win the Stanley Cup for the first time since 1972. He had 41 points (21 goals, 20 assists) in 77 regular-season games, then turned into a major factor in the Stanley Cup Playoffs. In 25 games, he scored 11 goals -- a rookie playoff record for the Bruins -- and finished with 19 points. In Game 7 of the Cup Final against the Vancouver Canucks, Marchand had two goals and an assist in a 4-0 victory.

Though the Bruins failed to make the playoffs in 2015-16, Marchand had a breakout season, scoring 37 goals, which ranked sixth in the NHL, and led the Bruins with a plus-21 rating.

Marchand would lead Boston in scoring with 85 points in each of the following two seasons before getting an NHL career-high 100 points (36 goals, 64 assists) in 79 games in 2018-19.

In the 2019 Stanley Cup Playoffs, Marchand led the Bruins with 23 points (nine goals, 14 assists) in 24 games, helping them advance to the Cup Final, where they lost in seven games to the St. Louis Blues.

Marchand scored on a penalty shot for his 800th NHL point in a 2-1 loss to the Toronto Maple Leafs on Nov. 6, 2022, joining Ray Bourque (1,506), Johnny Bucyk (1,339), Patrice Bergeron (1,040), Phil Esposito (1,012), Rick Middleton (898), and Bobby Orr (888) as the Bruins skaters to reach the milestone. He had two goals and an assist in his season debut, a 5-1 win against the Detroit Red Wings on Oct. 27, coming off a hip arthroscopy and labral repair on both hips May 27 that was projected to sideline him for six months.

Marchand was named Bruins captain after Bergeron retired from the NHL. He had two assists in his 1,000th NHL game, a 3-2 shootout loss to the Tampa Bay Lightning at TD Garden on Feb. 13, 2024. He set the Bruins record for Stanley Cup Playoff goals, passing Cam Neely with his 56th in a 3-1 victory against the Toronto Maple Leafs in Game 4 of the 2024 Eastern Conference First Round at Scotiabank Arena on April 27. He joined Bourque (46) as the only players in team history to have 40 multipoint playoff games.

Internationally, Marchand scored the goal that gave Canada the championship over Team Europe at the World Cup of Hockey 2016. He has also won a gold medal with Canada at the IIHF World Junior Championship (2007, 2008) and the 2016 IIHF World Championship.