John Grzelcyk celebrated a milestone recently. He celebrated 54 years as a member of the Bull Gang at Boston's TD Garden arena, working to transition the arena for different events. That 54 years is now split evenly having spent 27 years working at the original Boston Garden, and now 27 years at the TD Garden which replaced the original.

In February, he started undergoing treatment for prostate cancer, a diagnosis he did not disclose at work. For 30 days he would walk 20 minutes from the Garden to Mass General Hospital for radiation treatments, and then back to work when he was finished. "After the third week, I got tired. I took a day here and there, but not during workdays. I took a day when there [were no events] here." It wasn't until his son, Bruins defenseman Matt Grzelcyk, posted a video of John ringing the bell on his last day of treatment that anyone at work knew he had cancer. John called the Bull Gang "good therapy" and at 72 years old has no intent to retire anytime soon.

Read more of John's story here.