Last Updated on November 7, 2026 by Carmen Marins
Matt Grzelcyk is an American professional ice hockey player who plays as a defenseman for the Buffalo Sabres in the National Hockey League (NHL). Born on January 5, 1994, in Charlestown, Massachusetts, United States, Grzelcyk grew up in a family with strong connections to the Boston Bruins and the city’s hockey community.
His parents are John Grzelcyk and Kathleen Grzelcyk, who supported his development from childhood through his professional hockey career. He also has three older siblings: John Grzelcyk Jr., Andrew Grzelcyk and Julie Grzelcyk.
In his personal life, Grzelcyk has publicly acknowledged having a girlfriend. The Boston Bruins identified a woman named Esme as his girlfriend in October 2022, while an interview published in March 2025 confirmed that he was still in a romantic relationship. However, more recent reporting has not independently established his partner’s current identity or confirmed that he is married.
Matt Grzelcyk’s Girlfriend: Who Is Esme?
Matt Grzelcyk was publicly identified as being in a relationship with Esme during his time with the Boston Bruins.
The relationship was confirmed in an official Bruins article published on October 31, 2022, which featured Halloween costumes worn by players and their partners.
Grzelcyk attended a group celebration alongside teammates Charlie McAvoy and Mike Reilly.
The players and their partners dressed as characters from the Harry Potter franchise.
Grzelcyk wore a costume representing Albus Dumbledore, while Esme dressed as Dobby.
The Bruins explicitly identified Esme as his girlfriend, providing reliable confirmation of their relationship at that time.
Some secondary publications have identified her as Esme Bowden, although her surname has not been independently confirmed through the team’s official reporting.
Details about how the couple first met and when they began dating have not been reliably documented.
Matt Grzelcyk’s Relationship During His Time in Pittsburgh
Grzelcyk also publicly discussed having a girlfriend while playing for the Pittsburgh Penguins.
In an interview published by the Pittsburgh Post-Gazette on March 5, 2025, he explained that his relationship and his pet dog were important considerations when thinking about a potential trade.
At the time, Grzelcyk expressed a preference for remaining with Pittsburgh rather than moving to another NHL organization.
He explained that being traded could mean temporarily leaving his girlfriend and dog behind in Pittsburgh.
A subsequent article published on March 17, 2025, again mentioned his girlfriend and his golden retriever, Teddy.
The reporting confirmed that Grzelcyk was in a relationship during that period, although the publication did not identify his girlfriend by name.
Consequently, it cannot be independently established from that interview whether his girlfriend in 2025 was the same Esme identified by the Bruins in 2022.
Is Matt Grzelcyk Married?
There is no reliable public confirmation that Matt Grzelcyk is married.
Although the defenseman has acknowledged having a girlfriend, official NHL biographies and established hockey publications have not documented a wedding or identified a wife.
His romantic relationships have generally remained private, with only occasional references appearing in interviews and team publications.
Without a verified marriage announcement, he should not be described as married.
Matt Grzelcyk’s Children: Does He Have Kids?
There is no publicly verified information indicating that Matt Grzelcyk has children.
In March 2025, the Pittsburgh Post-Gazette explicitly reported that Grzelcyk did not have any children.
During the same interview, he discussed his golden retriever, Teddy, as an important part of his personal life.
Grzelcyk expressed concern about potentially being separated from his dog and girlfriend if he were traded to another team.
No subsequent reliable public announcement has established that he has become a father.
Therefore, there are no confirmed names or birth dates for any children.
Matt Grzelcyk’s Parents: Who Are His Father and Mother?
Matt Grzelcyk’s parents are John Grzelcyk and Kathleen Grzelcyk.
Their identities are confirmed by Boston University’s official hockey biography and the United States national junior team’s media guide.
Both parents played important roles in helping their youngest son develop his hockey skills while growing up in Charlestown.
Matt Grzelcyk’s Father: John Grzelcyk
John Grzelcyk, also known as John Grzelcyk Sr., is Matt Grzelcyk’s father and one of the most recognizable longtime employees associated with Boston’s hockey arena.
John began working at the original Boston Garden in 1967.
He became a member of the arena’s maintenance and conversion crew, commonly known as the Bull Gang.
The crew is responsible for transforming the building between different sporting and entertainment events, including converting the ice surface for Boston Bruins games into a basketball court for the Boston Celtics.
John continued working at TD Garden after the original Boston Garden closed in 1995.
His decades of service made him a familiar figure among Bruins players, employees and supporters.
Because of his father’s job, Matt had unusual opportunities to visit the arena throughout childhood.
He frequently accompanied John to work and occasionally skated on the Garden ice when the Bruins were away.
These experiences helped strengthen his dream of becoming an NHL player.
How John Grzelcyk Taught Matt to Skate
John introduced Matt to ice skating when he was approximately two years old.
According to a Boston University feature, John helped his son learn to maintain his balance by pushing stacked milk crates across the ice.
Matt gradually became comfortable skating and developed a passion for hockey.
His father also became involved in youth hockey coaching, including activities associated with Belmont Hill School.
As Matt grew older, John encouraged him to work hard while remembering to enjoy playing the sport.
In interviews, Matt has described his father’s influence as an important part of his childhood and professional development.
John Grzelcyk’s Cancer Recovery
In October 2022, NHL.com published a feature about John Grzelcyk’s recovery from prostate cancer.
John had been diagnosed in October 2021 and subsequently underwent radiation treatment.
Despite the difficult experience, he continued working at TD Garden during his treatment.
When John completed radiation therapy in April 2022, Matt attended the hospital alongside his mother and girlfriend to celebrate the milestone.
According to the NHL report, John was surprised by their arrival because he had not expected his son to attend.
The experience became an emotional family moment.
In October 2025, the Chicago Sun-Times reported that John had survived the illness and continued spending time at TD Garden, although he was no longer performing the demanding physical work associated with his earlier duties.
Matt Grzelcyk’s Mother: Kathleen Grzelcyk
Matt Grzelcyk’s mother is Kathleen Grzelcyk, who played an equally important role in supporting his hockey ambitions.
Kathleen previously worked as a secretary at a local school before retiring.
In March 2023, she participated in an interview with The Hockey Writers, discussing her son’s childhood and his journey to professional hockey.
Kathleen recalled that Matt was enthusiastic about skating from an early age.
During the summer, he frequently wore rollerblades and spent considerable time practicing his skating skills.
She also explained that Matt’s three older siblings helped him learn and develop confidence on the ice.
Although he faced challenges because of his relatively small stature for a professional defenseman, Kathleen believed his skating ability and understanding of the game gave him opportunities to succeed.
She remained supportive as Matt progressed through youth hockey, the United States National Team Development Program and Boston University.
Kathleen was particularly proud when the Boston Bruins selected her son in the 2012 NHL Entry Draft.
Matt Grzelcyk’s Siblings: Meet His Two Brothers and Sister
Matt Grzelcyk has three older siblings: John Grzelcyk Jr., Andrew Grzelcyk and Julie Grzelcyk.
Their identities were confirmed by Kathleen Grzelcyk during her March 2023 interview with The Hockey Writers.
All three helped introduce Matt to skating and participated in the family environment that encouraged his early interest in hockey.
John Grzelcyk Jr.: Matt Grzelcyk’s Older Brother
John Grzelcyk Jr. is one of Matt Grzelcyk’s older brothers.
Like their father, John Jr. became involved in the operation of TD Garden in Boston.
He has worked with the arena’s Bull Gang, helping prepare the building for hockey games, basketball games and other events.
He has also worked as a Zamboni driver during certain Bruins games.
According to reporting published by Boston.com in November 2024, John Jr. spent considerable time assisting with the arena’s overnight conversion work.
His role allowed the family’s connection to TD Garden to continue into another generation.
Matt has publicly expressed pride in the work performed by his father and older brother.
When he returned to Boston as a visiting player with the Pittsburgh Penguins in November 2024, he spoke about how meaningful it was to see familiar arena employees and family members.
Andrew Grzelcyk: Matt Grzelcyk’s Older Brother
Andrew Grzelcyk is another of Matt Grzelcyk’s older brothers.
His identity was confirmed in The Hockey Writers’ 2023 interview with their mother, Kathleen.
Andrew was part of the family environment in which Matt developed his early hockey skills.
According to Kathleen, Matt received help from his three older siblings when he began learning to skate.
Growing up with older siblings provided opportunities to participate in games and improve his coordination.
However, reliable public sources provide limited information about Andrew’s education, occupation and personal relationships.
Unlike his younger brother, Andrew has largely remained outside the professional hockey spotlight.
Julie Grzelcyk: Matt Grzelcyk’s Older Sister
Julie Grzelcyk is Matt Grzelcyk’s older sister and the only publicly identified daughter of John and Kathleen Grzelcyk.
Her name is confirmed in the family interview published by The Hockey Writers in March 2023.
Like her older brothers, Julie contributed to Matt’s early skating experiences.
The siblings grew up together in Charlestown, where hockey played an important role in their household.
Although Julie’s connection to Matt is publicly established, detailed information about her career, education and family life has not been extensively documented by reliable sports publications.
The Grzelcyk Family’s Connection to TD Garden
One of the most distinctive aspects of Matt Grzelcyk’s family is its long-standing association with TD Garden.
His father worked at the arena for more than five decades, while his brother John Jr. followed a similar professional path.
Growing up near the arena allowed Matt to experience Boston’s hockey culture from an early age.
He frequently visited the building with his father and became familiar with the employees responsible for maintaining the playing surface.
The connections continued after he became a professional player.
During his years with the Bruins, Matt occasionally interacted with members of the ice-maintenance crew during television timeouts.
These experiences made playing for Boston especially meaningful because he was representing the team his family had supported and worked around for generations.
Matt Grzelcyk and His Father’s Beanpot Hall of Fame Recognition
One of the most emotional moments in the family’s hockey history occurred in January 2023.
The Boston Bruins announced that Matt Grzelcyk and his father, John, would be inducted into the Beanpot Hall of Fame.
The Beanpot is an annual college hockey tournament involving Boston University, Boston College, Harvard University and Northeastern University.
Matt earned recognition for his achievements with Boston University, particularly his overtime-winning goal against Northeastern in the 2015 championship game.
John was recognized for his decades of service to the arena and his contributions to the tournament’s history.
The recognition made them the first father-and-son pair inducted into the Beanpot Hall of Fame together.
Matt helped organize the surprise announcement without revealing the news to his father.
He later explained that sharing the honor with John was particularly meaningful because his father had been connected to the tournament throughout his life.
The occasion became a memorable celebration for the entire Grzelcyk family.
Matt Grzelcyk’s Childhood and Family Background
Matt Grzelcyk grew up in Charlestown, a neighborhood of Boston, Massachusetts.
He began skating at approximately two years old and quickly developed a strong interest in ice hockey.
His childhood friend Jimmy Vesey, who also became an NHL player, was among the young athletes he played alongside.
The two met through youth hockey and represented the Middlesex Islanders during their early development.
Grzelcyk later attended Belmont Hill School before joining the United States National Team Development Program in Ann Arbor, Michigan.
Moving away from home at 16 was a significant adjustment, but it allowed him to compete against some of the country’s most promising young players.
He subsequently returned to Massachusetts to attend Boston University.
One reason he selected the university was its proximity to his family and childhood friends.
How Matt Grzelcyk’s Family Influenced His NHL Career
Family support helped Matt Grzelcyk overcome challenges throughout his hockey development.
His father introduced him to skating, while his mother encouraged him to continue improving despite concerns about his size.
His older siblings helped create a competitive childhood environment and supported his early experiences on the ice.
Grzelcyk represented the United States at the 2012 IIHF World Under-18 Championship, helping the national team win a gold medal.
Later that year, the Boston Bruins selected him in the third round of the NHL Entry Draft, 85th overall.
His family traveled to Pittsburgh for the draft and celebrated when their hometown organization selected him.
After four seasons at Boston University, Grzelcyk began his professional hockey career with the Bruins organization.
He made his NHL debut on December 14, 2016, against the Pittsburgh Penguins.
He subsequently developed into a regular member of Boston’s defensive lineup and helped the team reach the Stanley Cup Final in 2019.
Matt Grzelcyk’s Career Beyond Boston
After spending his first seven full NHL seasons with the Boston Bruins, Grzelcyk signed with the Pittsburgh Penguins on July 1, 2024.
During the 2024–25 season, he appeared in all 82 regular-season games and recorded a career-high 40 points, including 39 assists.
He subsequently joined the Chicago Blackhawks in October 2025.
On September 25, 2026, the Buffalo Sabres signed Grzelcyk to a one-year contract worth $850,000.
The move gave him another opportunity to contribute his experience and defensive abilities to an NHL organization.
Despite playing for different teams, Grzelcyk has maintained strong connections to Boston and the family members who supported his development.
Frequently Asked Questions About Matt Grzelcyk’s Family
Who is Matt Grzelcyk’s girlfriend?
The Boston Bruins publicly identified a woman named Esme as Matt Grzelcyk’s girlfriend in October 2022. He also confirmed having a girlfriend in March 2025, although her name and the current status of that relationship have not been independently established in more recent reporting.
Is Matt Grzelcyk married?
There is no reliable public confirmation that Matt Grzelcyk is married.
Does Matt Grzelcyk have children?
Grzelcyk confirmed in March 2025 reporting that he did not have children. No subsequent verified public announcement has established that he has become a father.
Who is Matt Grzelcyk’s father?
His father is John Grzelcyk Sr., a longtime TD Garden employee who worked with the arena’s Bull Gang for more than five decades.
Who is Matt Grzelcyk’s mother?
His mother is Kathleen Grzelcyk, a retired school secretary who has supported his hockey career since childhood.
How many siblings does Matt Grzelcyk have?
Matt Grzelcyk has three older siblings: John Grzelcyk Jr., Andrew Grzelcyk and Julie Grzelcyk.
Who is John Grzelcyk Jr.?
John Grzelcyk Jr. is Matt’s older brother. He has worked at TD Garden with the arena’s conversion crew and has operated the Zamboni during Bruins games.
Who is Andrew Grzelcyk?
Andrew Grzelcyk is one of Matt’s older brothers. His identity was confirmed by their mother in a 2023 interview with The Hockey Writers.
Who is Julie Grzelcyk?
Julie Grzelcyk is Matt’s older sister. She was among the siblings who helped him learn to skate during childhood.
What happened to Matt Grzelcyk’s father?
John Grzelcyk underwent treatment for prostate cancer in 2022 and subsequently recovered. His experience was documented by NHL.com and later reporting from the Chicago Sun-Times.
Where is Matt Grzelcyk’s family from?
The Grzelcyk family has longstanding connections to Charlestown, a neighborhood of Boston, Massachusetts, where Matt was born and raised.
Combining a deep passion for hockey with an analytical mindset, Carmen Marins covers the NHL from the opening night of the season all the way through the Stanley Cup playoffs. She focuses on game strategy, team chemistry, trade deadline updates, and player performance metrics, breaking down high-speed ice action into engaging, accessible insights for readers.
