Matt Grezlyck's dad worked changing the ice over to parquet and vice versa
Personal life
Grzelcyk's father and older brother, both named John, work at TD Garden. John Grzelcyk Sr. started working at Boston Garden in 1967 and has stayed with the organization ever since. On October 25, 2021 Grzelcyk's father was diagnosed with prostate cancer, while undergoing radiation treatments John Sr. continued work at TD Garden.[17] The two elder Grzelcyks are members of the arena's "bull gang", which converts the building from hockey to basketball and back: John Jr. is also a Zamboni driver for certain Bruins games.[18]