Amateur Mike Addesa, who coached Hathaway in the Hockey Night in Boston Elite Tournament in 2009, suggested that Mark White, the assistant coach for the
Brown Bears men's ice hockey team, take a look at the player. While attending
Brown University, Hathaway studied business, entrepreneurship and organizations. During the summer after his sophomore year, Hathaway and his Bears teammate Mike Juola purchased and operated a
lobster roll cart. Hathaway was part of a team of freshmen, also including
Dennis Robertson, Matt Wahl,
Marco de Filippo Roia, Mark Hourihan, and Jake Goldberg, that was expected to play a key role with the Bears in the
2010–11 season. He scored his first collegiate point on November 5, 2010,
assisting David Brownschidle in the second period of a 3–3 tie against the
Quinnipiac Bobcats. Hathaway later earned his first career goal in a 7–3 loss to
Minnesota State at the 2011
Shillelagh Tournament championship game on January 2, 2011. At the end of the season, Hathaway was one of 23 Bears, including eight freshmen, named to the 2011
ECAC Hockey All-Academic Team, given to student-athletes with at least a 3.00 cumulative
grade point average on a 4.00 scale. As a sophomore during the
2011–12 season, Hathaway scored his first goal of the year on October 29, 2011, in a 3–2 victory over the
Princeton Tigers. He missed six games due to illness, and finished the season with only three goals and five assists. On May 8, 2012, Hathaway was named one of four assistant captains for the Bears, and on June 26, he was named to the ECAC Hockey All-Academic Team for the second year in a row. On May 14, 2014, Hathaway was awarded the Patrick S. Jones Memorial Trophy, a coaches' award given to the "member of the team who generates the most spark and enthusiasm in building team spirit". Across his collegiate hockey career, Hathaway totaled 58 points (20 goals and 38 assists) and 178
penalty minutes in 121 games with the Bears.
Professional Calgary Flames Following his junior year at Brown, Hathaway was invited to attend summer development camps with the
Boston Bruins and
Pittsburgh Penguins. On March 14, 2014, he signed a minor league deal with the
Abbotsford Heat, the
American Hockey League (AHL) affiliate of the
Calgary Flames. Hathaway finished out the
2013–14 AHL season with the Heat, appearing in eight regular-season games and one playoff game. On April 13, 2015, the Calgary Flames of the
National Hockey League (NHL) signed Hathaway to a two-year
two-way contract. After spending much of the
2015–16 season with the
Stockton Heat, Hathaway earned his first recall and made his NHL debut for the Flames on February 29, 2016, in a 4–3 loss to the
Philadelphia Flyers. Hathaway scored his first career NHL goal on November 20, 2016, against the
Detroit Red Wings.
Washington Capitals in 2021 in 2022 On July 1, 2019, Hathaway signed a four-year, $6 million contract with the
Washington Capitals. On November 18, 2019, Hathaway was given a
match penalty and was ejected from a game against the
Anaheim Ducks when he intentionally spat on skater
Erik Gudbranson during a fight. Following the game ejection, the NHL suspended Hathaway for three games without pay, and announced that he would forfeit $24,193 to the Players' Emergency Assistance Fund as part of his punishment. The Ducks' reaction to the spitting incident was vitriolic, with Gudbranson saying, "It's something you just don't do in our game, and he did it". Teammate
Derek Grant added, "At the end of the day, it's probably the least respectful thing you can ever do to somebody." When the NHL returned to play, Hathaway was one of the 31 Capitals invited to
Toronto for the
2020 Stanley Cup playoffs. Hathaway played on the fourth line with
Nic Dowd and
Carl Hagelin throughout the
2020-21 NHL season.
Boston Bruins On February 23, 2023, Hathaway and
Dmitry Orlov were traded from the Capitals to the Boston Bruins in exchange for
Craig Smith, a 2023 first-round pick, a 2025 second-round pick and a 2024 third-round pick.
Philadelphia Flyers Leaving the Bruins at the conclusion of his contract, Hathaway was signed on the opening day of free agency to a two-year, $4.75 million contract with the Philadelphia Flyers on July 1, 2023. One year prior to the conclusion of his initial contract with them, the Flyers signed Hathaway to a two-year extension worth $4.8 million. He will be an unrestricted free agent (UFA) after the conclusion of the 2026-27 season. == Personal life ==