Mark Kastelic Bio
Mark Kastelic is an American professional ice hockey player who serves as a center for the Boston Bruins of the National Hockey League (NHL). Born on March 11, 1999, in Phoenix, Arizona, Kastelic was drafted in the fifth round, 125th overall, during the 2019 NHL Entry Draft by the Ottawa Senators. He made his NHL debut in January 2022 and has established himself as a reliable two-way forward known for his physical play and offensive instincts. Kastelic comes from a distinguished hockey family with deep NHL roots, including his father Ed Kastelic and grandfather Pat Stapleton, both of whom enjoyed lengthy professional careers in the league.
Early Life and Background
Mark Kastelic grew up in Phoenix, Arizona, where he developed his passion for hockey at a young age. He played his youth hockey with the Phoenix Jr. Coyotes organization while attending Desert Vista High School. Kastelic’s family environment nurtured his hockey aspirations, as his father Ed Kastelic was a veteran of 220 NHL games with the Washington Capitals and Hartford Whalers. His grandfather, Pat Stapleton, logged over 600 games with the Chicago Blackhawks and Boston Bruins, while his uncle Mike Stapleton appeared in 697 NHL contests for multiple franchises. This rich hockey heritage provided Mark with invaluable guidance and mentorship throughout his development.
Path to Professional Hockey
Kastelic joined the Calgary Hitmen of the Western Hockey League (WHL) in 2015, beginning his journey through major junior hockey. Over five seasons with the Hitmen from 2015 to 2021, he developed into a prolific scoring threat and respected team leader. His most outstanding campaign came during the 2018-19 season when he registered 47 goals and 77 points, demonstrating his ability to be a primary offensive contributor at the junior level. Kastelic served as team captain during both the 2018-19 and 2019-20 seasons, showcasing his leadership qualities and commitment to his team. Despite his production, he went undrafted twice during his time with Calgary before ultimately hearing his name called in the 2019 NHL Entry Draft as an over-age prospect.
Mark Kastelic Career
Calgary Hitmen Years (2015-2021)
Following his exceptional 2018-19 season with the Calgary Hitmen, Kastelic entered the 2019 NHL Entry Draft as a 20-year-old prospect. The Ottawa Senators selected him in the fifth round, 125th overall, recognizing his offensive potential and two-way game. After being drafted, Kastelic returned to Calgary for two additional WHL seasons, continuing to hone his skills and maintain his leadership role as team captain. His development trajectory showed steady improvement, and his experience in major junior hockey prepared him for the physical demands of professional competition.
Ottawa Senators Era (2021-2024)
Kastelic signed a three-year, entry-level contract with the Ottawa Senators following his junior career. He began his professional development with the Belleville Senators, Ottawa’s primary American Hockey League (AHL) affiliate, during the 2021-22 season. Due to injuries affecting the Senators roster, Kastelic received his first NHL call-up in January 2022. He made his NHL debut on January 29, 2022, against the Anaheim Ducks, marking the realization of his childhood dream. Kastelic scored his first two career NHL goals on April 23, 2022, including the eventual game-winner, in a 6-4 victory over the Montreal Canadiens.
During the 2022-23 season, Kastelic earned a permanent spot on the Ottawa roster out of training camp. His consistent play impressed the organization, leading general manager Pierre Dorion to sign him to a two-year, $1.67 million contract extension on October 27, 2022. Kastelic scored the game-winning goal on January 13, 2023, in a 5-3 victory over the Arizona Coyotes, a memorable moment as he played in his hometown of Phoenix for the first time as an NHL player. He experienced some roster movement throughout the season, being assigned to Belleville during the All-Star break due to illness before being recalled in late February.
Boston Bruins Era (2024-Present)
On June 24, 2024, Kastelic’s career took a significant turn when the Ottawa Senators traded him to the Boston Bruins. The deal sent Kastelic along with goaltender Joonas Korpisalo and a 2024 first-round draft pick to Boston in exchange for goaltender Linus Ullmark. Kastelic made the Bruins roster out of training camp and immediately contributed to the team’s fourth-line production. He recorded his second career two-goal game on October 10, 2024, against the Montreal Canadiens, and followed with his first career three-point game just four days later, recording three assists in a 4-3 loss to the Florida Panthers.
His strong early-season performance earned Kastelic a three-year contract extension worth $1.567 million annually, signed on January 3, 2025. However, the Bruins experienced significant struggles following the 4 Nations break in mid-February, and Kastelic’s production declined sharply. After the break, he managed only a single goal for the remainder of the season. Kastelic suffered an injury on March 22, 2025, against the Vegas Golden Knights, with no immediate timetable for his return. The team announced on April 10, 2025, that he would miss the rest of the campaign. Kastelic finished his inaugural season with Boston tallying five goals and nine assists for 14 points, matching his career high in goals while establishing new personal bests in assists and total points.
Playing Style and Strengths
Kastelic plays the center position and shoots right-handed, combining size at 6-foot-4 with an aggressive, physical approach to the game. His offensive instincts allow him to contribute scoring from the middle of the ice, while his hockey lineage has helped him develop strong two-way awareness. Kastelic’s leadership experience as a junior team captain translated well to his professional career, and he has demonstrated the ability to play a responsible checking role while also providing supplementary offense. His family background in professional hockey has contributed to his hockey IQ and understanding of the professional game.
Notable Events and Milestones
Kastelic achieved several significant milestones during his young NHL career. His NHL debut against the Anaheim Ducks in January 2022 represented the culmination of years of dedication to his craft. Scoring his first career goals, including a game-winner, against the Montreal Canadiens in April 2022 provided a memorable breakthrough moment. Playing his hometown game against the Arizona Coyotes in January 2023 and delivering the game-winning goal delivered a special experience connecting his roots to his professional success. His contributions during the Bruins’ Centennial Game against the Canadiens, including two assists in a 6-3 victory, represented meaningful moments in the franchise’s history.
Mark Kastelic Career Statistics
Throughout his professional career spanning from 2021 to present, Kastelic has appeared in over 100 NHL games while also accumulating significant American Hockey League experience. His offensive totals have shown growth each season, with his 2024-25 campaign producing his most points as a professional. Kastelic’s junior career with the Calgary Hitmen remains his most productive statistical period, highlighted by his 47-goal, 77-point season in 2018-19.
Notable Performances
Kastelic’s most productive NHL season came with the Boston Bruins during the 2024-25 campaign, where he recorded five goals and nine assists for 14 points while playing a steady checking-line role. His multiple two-goal and three-point performances throughout the season demonstrated his ability to contribute offensively in a limited minutes role. During his time with the Ottawa Senators, Kastelic showed promise as a developing forward capable of chipping in important goals while excelling in forechecking and puck possession situations.
Mark Kastelic Family
Family Background and Hockey Lineage
Mark Kastelic comes from one of hockey’s most accomplished American families. His father, Ed Kastelic, played 220 games in the NHL with the Washington Capitals and Hartford Whalers, establishing a professional standard that Mark would later follow. His grandfather, Pat Stapleton, was a durable defenseman who appeared in over 600 NHL games with the Chicago Blackhawks and Boston Bruins. Uncle Mike Stapleton continued the family tradition, playing 697 career NHL games for multiple teams. This three-generation NHL presence represents a remarkable achievement in professional hockey, providing Mark with unparalleled insight into what it takes to succeed at the sport’s highest level.
Personal Life
Kastelic is of Slovenian descent through his family lineage. He maintains strong connections to his Arizona roots, with his hometown return game against the Arizona Coyotes holding special significance given his Phoenix upbringing. Kastelic continues to carry forward the family legacy of dedication, work ethic, and passion for hockey that has defined multiple generations of his family.
2025 Season Performance
The 2024-25 NHL season represented a significant chapter in Kastelic’s career as he transitioned to the Boston Bruins following four seasons in the Ottawa Senators organization. After a strong training camp, he secured a roster spot and quickly became a reliable contributor on the Bruins’ fourth line. His early-season form was particularly impressive, with multiple multi-point performances demonstrating his ability to provide secondary scoring. The Bruins rewarded his efforts with a three-year contract extension in early January, signaling their commitment to his development.
Despite his personal success early in the campaign, the Bruins as a team encountered considerable challenges after the mid-February break. Kastelic experienced a dramatic decline in his offensive output during this difficult stretch, managing only one goal following the 4 Nations tournament. His season took a further turn when he suffered an injury against the Vegas Golden Knights on March 22, 2025, forcing him to the sidelines for the remainder of the year. The Bruins announced his season-ending status on April 10, concluding a year of promise and setback. Kastelic finished with five goals and nine assists, tying his career best in goals while establishing new highs in assists and total points, providing a foundation to build upon when healthy.