Matt Grzelcyk is no stranger to TD Garden.
Even before the Charlestown native donned a Bruins sweater for 445 games, Grzelcyk found himself on Causeway Street early and often.
After all, it runs in the family.
Just across the bridge from where the Grzelcyk family resides, Grzelcyk’s father, John, has transformed the Garden ice to parquet floor — and vice-versa — for more than 55 years.
John Grzelcyk has served as part of the “bull gang” — the hard-working crew that changes the playing surface at Boston’s barn from a frozen sheet to hardwood — since 1967.