Collegiate On July 22, 2010, Carpenter committed to play
college ice hockey at
Boston College. After fielding calls from over 20 programs on the first day she was eligible for recruitment, she chose between Boston College and
Harvard, swayed in part by her experience playing alongside BC students at the international level and her respect for Eagles coach
Katie King. In the
2011–12 season, Carpenter's freshman year, she led the Eagles in scoring with 39 points, the first freshman to do so since 2006. She was named a first team
Hockey East All-Star and to the conference's All-Rookie Team, as well as its rookie of the month on four separate occasions. Carpenter took a leave of absence for the
2013–14 season in order to prepare for the
2014 Winter Olympics with the
American national team. As a senior and one of three team
captains in the
2015–16 season, Carpenter set program records with 43 goals, 45 assists, and 88 points in 41 games. She recorded four hat tricks, including four goals against
Syracuse University on December 10, 2015, a game in which she set the program record for career goals. She was named Most Valuable Player of the Hockey East Tournament, scoring three goals and six points as Boston College claimed the conference championship. She and the Eagles' season would end in the finals of the
2016 Frozen Four, with the team having set NCAA records for assists and points in a season, with 379 and 592, respectively. She was named a top-three finalist for the Patty Kazmaier Award, but ultimately did not repeat as its winner. However, she opted to return to
Boston College for her senior season rather than immediately joining the league. On April 28, 2016, Carpenter's playing rights were traded from the Riveters to the
Boston Pride in exchange for the rights to
Miye D'Oench, the Pride's fourth-round selection from the 2015 draft. During the summer of 2016, following her graduation from Boston College, Carpenter signed a one-year contract with the Pride worth $19,500, making her the highest-paid player from the 2015 NWHL draft class. In the
2016–17 season, Carpenter made an immediate impact with the Pride. She recorded 9 goals and 20 assists for 29 points in 17 regular season games, finishing as the league's second-highest scorer. She finished the season as the second highest scorer in the league. Carpenter was selected to participate in the
2nd NWHL All-Star Game in February 2017, playing for Team Steadman, where she recorded a goal and an assist.
Shenzhen KRS and Shenzhen KRS Vanke Rays (2017–21) Following her season in the NWHL, Carpenter registered for the
2017 Draft of the
Canadian Women's Hockey League (CWHL) and was drafted in the second round, 13th overall by
Shenzhen-based
Kunlun Red Star WIH, one of the two Chinese expansion teams. On January 15, 2018, after being cut from the
United States Olympic team, she signed with Kunlun, swayed in part by her father
Bobby Carpenter being a coach of their
Kontinental Hockey League (KHL) club,
HC Kunlun Red Star. The following season, the two Chinese CWHL teams were merged to become the
Shenzhen KRS Vanke Rays, and Carpenter re-signed with the team. She would finish the
2018–19 season with 31 points in 28 games. With the CWHL ceasing operations after the 2018–19 season, the Vanke Rays joined the
Zhenskaya Hockey League (ZhHL), the Russian women's league. Carpenter again chose to remain in China, citing the better facilities and player support provided by the team than what she had experienced in the NWHL.
Professional Women's Hockey Players Association (2022–23) On May 2, 2019, over 200 women's hockey players announced via coordinated social media posts that they would boycott any professional league in North America for the 2019-20 season. The players stated they were "coming together, not just as individual players, but as one collective voice to help navigate the future" of women's professional hockey. On May 20, 2019, the players formed the
Professional Women's Hockey Players Association (PWHPA) as a non-profit organization. The PWHPA organized the
Dream Gap Tour that toured several cities in Canada and the United States, featuring community involvement events and exhibition games where the top players in the sport competed. The
2022–23 season saw Carpenter return to North America, participating in PWHPA events for the first time with Team Scotiabank, earning PWHPA All-Star honors and a spot in the skills competition at the
2023 National Hockey League All-Star Game. In May 2022, the PWHPA signed a letter of intent with
Billie Jean King Enterprises and the
Mark Walter Group to explore a new professional league.
New York Sirens (2023–25) On September 8, 2023,
New York of the newly created
Professional Women's Hockey League (PWHL) announced that they had signed Carpenter, along with American forward
Abby Roque and Canadian defenseman
Micah Zandee-Hart, to three-year contracts as part of the league's pre-draft free agency period. On December 21, 2023, Carpenter and teammate
Ella Shelton were named the first alternate captains in team history. In 24 games in the inaugural PWHL season, she recorded eight goals and 15 assists for 23 points, including a league-best six game points streak. She ranked first in assists and tied
Marie-Philip Poulin for second in the league in points, earning nominations for forward of the year and league MVP. The Sirens finished the inaugural season with a record of 5-12-3, placing sixth in the league and missing the playoffs. In the
2024-25 season, Carpenter continued as alternate captain for New York (now called the
New York Sirens). On January 31, 2025, during a regular season game against the Boston Fleet that ended in a 3-2 shootout loss, Carpenter suffered a serious facial injury when she took a shot to the face that shattered her jaw. The injury required reconstructive surgery and forced her to miss four games with the Sirens as well as the U.S. Women's National Team Rivalry Series. Demonstrating her resilience, Carpenter returned to play on February 19, 2025, scoring the only goal for New York in a 4-1 loss to the Toronto Sceptres. Despite missing time due to injury, Carpenter finished the season with 20 points (11 goals, 9 assists) in 26 regular season games, ranking as the third-highest scorer on the team. The Sirens finished in last place for the second consecutive season with a record of 8-4-5-13 and 37 points, missing the playoffs after suffering a nine-game losing streak during Carpenter's absence in February.
Seattle Torrent (2025–present) During the league's expansion to eight teams ahead of the
2025–26 season, Carpenter was left unprotected by New York and signed a one-year contract with the
Seattle Torrent on June 6, 2025. At the time of her signing, Carpenter ranked third all-time in PWHL career points with 43 in 50 games played and was tied for first all-time in power play points with 18 (5 goals, 13 assists). General Manager Meghan Turner praised Carpenter as "a true competitor who brings intensity every time she steps on the ice" and "an elite two-way player who has proven to be one of the best in the world for years." Carpenter made her Torrent debut on November 22, 2025, in the team's inaugural game against the
Vancouver Goldeneyes, recording an assist in a 4–3 overtime loss. The Torrent played their home opener on November 28, 2025, against the two-time defending
Walter Cup champion
Minnesota Frost before a record-setting crowd of 16,014 fans at
Climate Pledge Arena. The attendance set multiple records: the largest crowd for a women's hockey game in a U.S. arena, surpassing the previous U.S. professional women's hockey record of 14,288, and the highest-attended primary home venue game in PWHL history. Twenty-two seconds later, Knight scored the game-winning goal, giving Seattle its first victory in franchise history by a score of 2–1. Carpenter's goal marked her 20th career PWHL goal and was scored against the Sirens, for whom she remains the all-time leading scorer with 43 points in 50 games over two seasons. Carpenter scored a power-play goal almost 6½ minutes into the second period and added another goal about five minutes later to give the Torrent a 3-0 lead. The performance marked Carpenter's first multi-point game of the season, and she also recorded power-play goals in consecutive games. Carpenter was named first star of the game. On December 23, 2025, Carpenter scored the game-tying goal at 3:32 of the second period in a 2–1 victory over the
Montreal Victoire before 10,276 fans at Climate Pledge Arena. On a 2-on-1 rush with
Julia Gosling, Carpenter cleaned up the rebound after Gosling's shot was saved by 2024–25
PWHL Goaltender of the Year Ann-Renée Desbiens, scoring her fourth goal of the season to tie the game 1–1. In a home game on March 11, 2026, Carpenter scored with 5.6 seconds remaining in the first period against the
Boston Fleet, carrying the puck end-to-end and backhanding in the goal to tie the game 1–1. The goal extended her point streak to three consecutive games since returning from the
2026 Winter Olympics. The game was the Torrent's first-ever win over Boston and ended a six-game winning streak for the first-place team. ==International play==