Junior Comeau played four seasons in the
Western Hockey League (WHL) for the
Kelowna Rockets. He was a second round selection of the team in the 2001 WHL Bantam Draft. After appearing in three games as a 15-year-old, Comeau joined the Rockets full-time in
2002–03, where he scored 23 points in 56 games. He appeared in 19 playoff games as the Rockets won the
President's Cup. Comeau improved to 33 points in
2003–04, and while the Rockets failed to repeat as WHL champions, they qualified for the
2004 Memorial Cup as tournament hosts. Comeau and the Rockets won the national championship with a 2–1 victory in the final game over the
Gatineau Olympiques. . Following the triumph, Comeau was selected by the
New York Islanders as their second round selection, 47th overall, at the
2004 NHL entry draft. He returned to the Rockets for the
2004–05 season, where he scored 24 goals and 47 points. Comeau completed his junior career in
2005–06. He scored 74 points in 60 games and was named to the WHL's Western Conference All-Star Team. He then joined the
Canadian junior team for the
2006 World Junior Hockey Championship. Comeau led Team Canada in scoring with seven points in six games to lead Canada to its second consecutive gold medal. Comeau began his professional career to conclude the season, joining the Islanders'
American Hockey League (AHL) affiliate, the
Bridgeport Sound Tigers, for seven playoff games. Comeau split the
2006–07 season between New York and Bridgeport. He had 19 points in 31 AHL games and 15 points in 51 NHL games. Comeau again split season between New York and Bridgeport in
2008–09, scoring 25 points in 53 games with the Islanders. He finally earned a permanent spot with the NHL team in
2009–10. Comeau scored 17 goals and 35 points in 61 games. He established career highs in
2010–11 with 24 goals, 22 assists and 46 points, a season which earned Comeau a one-year, $2.5 million contract from the Islanders.
Calgary Flames Comeau struggled to begin the
2011–12 season, and after failing to register a point in 16 games, was placed on
waivers by the Islanders, where he was claimed by the
Calgary Flames. He scored five goals and 15 points with the Flames. Comeau became a
restricted free agent following the season; the Flames would have had to give him a qualifying offer at least equal to his last contract to retain his rights. The Flames declined to offer him a contract, and he subsequently became an unrestricted
free agent. Despite this, Comeau chose to re-sign with the Flames, taking a 50% pay cut to do so; the two parties agreed on a one-year, $1.25 million contract for
2012–13.
Columbus Blue Jackets Days before the 2013
NHL trade deadline, Comeau was traded to the
Columbus Blue Jackets in exchange for a
2013 fifth-round draft pick. Comeau finished the season with 5 points in 9 games. A knee injury limited him to 61 games the following year.
Pittsburgh Penguins On July 1, 2014, Comeau signed a one-year contract as a free agent with the
Pittsburgh Penguins for the
2014–15 season. Comeau proved a solid addition to the Penguins, proving his versatility in skating alongside,
Sidney Crosby and
Evgeni Malkin. On November 26, 2014, he scored his second career hat-trick, with two goals scored during regulation and one as the game-winning overtime, against the
Toronto Maple Leafs. Comeau scored 11 goals in 32 games before he suffered a wrist injury against the
Florida Panthers on December 22. Having missed 20 games, Comeau later returned to the line-up however was still hampered by his wrist to suffer a drop in production. Despite his injury, Comeau still recorded his best year since 2011 with the Islanders, in producing 16 goals, including a team leading 5 game-winning tallies, and 31 points in 61 games. Comeau recorded his first post-season goal against the
New York Rangers on April 16, 2015.
Colorado Avalanche On July 1, 2015, Comeau signed a three-year contract as a free agent with the
Colorado Avalanche holding an average value of $2.4 million a year. He made his debut with the Avalanche in the
2015–16 season on opening night in a 5-4 defeat to the
Minnesota Wild on October 8, 2015. In adding a missing versatility to the Avalanche bottom 6 forwards, Comeau became a staple of the team's penalty killing unit alongside
Carl Söderberg. On November 14, 2015, in his 500th career game, Comeau registered his first goal in an Avalanche uniform, marking his 200th NHL point in a 6-1 defeat of the
Montreal Canadiens. On March 28, 2016, Comeau scored his 100th career goal, adding the opening marker in 4-3 victory over the
Nashville Predators. Unable to help Colorado qualify for the post-season, Comeau contributed with 12 goals and a career best 24 assists for 36 points in 81 games. On March 4, 2017, in the midst of the worst season in Colorado history, Comeau became an infamous viral sensation when he passed to a teammate behind him on a breakaway, which was intercepted by a Winnipeg player. The Avalanche were losing 5-0 at the time. In his final season with the club, Comeau recorded 13 goals and 21 assists in 79 games. The Avalanche qualified for the
postseason for the first time since 2014, matching up with the
Western Conference-leading
Nashville Predators. Comeau scored two goals in six games during their first-round exit.
Dallas Stars On July 1, 2018, Comeau left the Avalanche organization after three seasons to join the
Dallas Stars on a three-year, $7.2 million contract. "I didn't want to waste their time or my time," Comeau said of meeting with other teams. "It's important that I'm on a team that I think can win. Dallas has all those pieces and also wants to improve. That was very appealing to me." In February 2020, Comeau was made an
alternate captain along with teammate
Esa Lindell. Comeau and
John Klingberg serve as alternate captains during road games, while Lindell and
Tyler Seguin serve as alternate captains during home games. Following the conclusion of his three-year contract, on June 21, 2021, Comeau signed a one-year extension for the season to remain with the Stars. ==Career statistics==