Junior For the first three years of his hockey career, Borgen played with
Moorhead High School in
Minnesota, competing in the
Minnesota State High School League (MSHSL). In 2013, he and Moorhead went to the
MHSHL Tournament. On March 22, 2014, during the 2013–14 season, a skate blade clipped Borgen's neck, cutting through some neck muscle, but stopping just short of his
carotid artery. Borgen ended his first two seasons with Moorhead totaling 12
goals, 32
assists, and 61
penalty minutes through 57 regular season and playoff games. During the 2014–15 season, with Moorhead through the regular season and playoffs, he collected 28 points and 70
penalty minutes through 27 games. Borgen then joined the
Omaha Lancers of the
United States Hockey League (USHL) to complete the
2014–15 season. He played 21 games with the Lancers, notching one goal and seven assists for eight
points. He was ranked 114th overall in the NHL Bureau of Central Scouting's North American skater rankings.
Collegiate Following his time with the Lancers, Borgen began his collegiate career with the
St. Cloud State Huskies of the
National Collegiate Hockey Conference (NCHC). During the
2015–16 season, his freshman season at St. Cloud State, Borgen recorded his first collegiate point, an assist, in a game against
Miami University on October 30. He later recorded his first collegiate goal against
Western Michigan University. In the end, he recorded 11 assists through 22 games, leading all NCHC freshman defensemen. As a result, he was selected to the
NCHC All-Rookie team. In a game during the
2016–17 season, Borgen, while arguing a call, shoved a referee, causing him to gain a two-game suspension. That season, he notched two goals and 10 assists with 60 penalty minutes through 33 games. Partway through the
2017–18 season, Borgen had recorded two goals and 12 assists for a career-high and team-leading 14 points to become the
NCHC Defensive Defenseman of the Year, as well as an All-NCHC Team Honorable Mention. He ended the season with one more assist, for 13 total.
Professional After his junior season with the Huskies, Borgen was signed to a three year,
entry-level contract by the Buffalo Sabres on March 25, 2018. During the
2017–18 season, Borgen only played eight games with Rochester. During the
2018–19 season, in Rochester, Borgen tallied three goals and 11 assists for 14 points through 71 games. Near the end of the season, on March 26, 2019, Borgen made his NHL debut against the
Ottawa Senators. Borgen's call-up to the NHL that season would let him play four games. During the
2019–20 season, Borgen notched only one goal and 10 assists for 11 points in 61 games. During the
2020–21 season, Borgen played 10 games with Buffalo, totaling 30 hits and 14 blocked shots. On July 21, 2021, Borgen was selected from the Sabres by the
Seattle Kraken in the
2021 NHL expansion draft. The Kraken then signed Borgen to a two-year, contract on August 5. He ended the
2021–22 season with two goals and six assists through 36 contests. On February 7, 2023, Borgen played in his 100th career game, a 4–0 loss to the New York Islanders. During the
2022–23 season, Borgen achieved three goals and 17 assists through all 82 games, which at the time were his career highs. On April 24, He scored his first NHL playoff goal, the first goal of a 3–2
overtime victory over the
Colorado Avalanche. Borgen ended up playing all 14 playoff games with the Kraken. On January 1, 2024, during the outdoor
2024 NHL Winter Classic against the
Vegas Golden Knights, Borgen scored the second goal of the game—also his first of the season—as part of a 3–0 victory. During the
2023–24 season, Borgen set even greater career highs, collecting 22 assists, which ,combined with three goals, totaled to 25 points. On January 25, 2025, he was signed by New York to a five-year, contract. With New York that season, Borgen recorded four goals and nine assists for 13 points through 51 games. He also totaled 73 hits and 80 blocked shots. ==International play==