As Eamon Baker, flanked by siblings Mairead and Colin, prepared for the Dot Pot tournament’s ceremonial puck drop Saturday, the crowd at Garvey Park’s street hockey rink fell quiet — sticks stopped scraping the pavement, someone turned down the music, and dozens of teenagers put down their red Solo cups.

After he dropped the burnt-orange roller hockey ball, the crowd cheered. The neighbors were there to watch hockey, hang out with friends, and enjoy the weather, but foremost, they were there to support a few of their own: the Baker children and their mother, Kristine, all of whom are still reeling from the April death of Michael Baker, the family patriarch and a Boston police officer.

Eileen Murray-Walsh, Kristine’s sister, teared up as she talked about the outpouring of support she has felt since her brother-in-law’s death.

“We are blessed with a great family, wonderful friends, and such a phenomenal community that takes care of us without having to be asked,’’ Murray-Walsh said.

But that’s what Dorchester is all about, said Timmy Galvin. Galvin, along with friends Ryan Sweeney and Peter Cahill, organized this year’s second annual Dot Pot, a street hockey tournament that raises money for a local cause they determine.

“If something tragic ever happened to me or Ryan or Peter, we know they’d do the same for us,’’ Galvin said.

The three 19-year-olds began organizing this year’s tournament a couple months ago, when they returned from school to Dorchester for the summer. After a successful first year, they said they were determined to establish the tournament as tradition.

Last year, the Dot Pot raised money for the family of Carl Hosea, who was diagnosed with cancer in the spring of 2015 and died shortly after the first tournament. His son, James, who lives across the street from Murray-Walsh, came to this year’s Dot Pot, he said, because neighbors look out for one another.

“It’s nothing out of the ordinary here, because the neighborhood has always been so close and always helps each other,’’ he said. “It goes to show that it doesn’t matter who it is or what happened, everyone’s there for each other.’’

The three thought up the idea for the Dot Pot while skating around Garvey Park last summer and they wanted it to be a different kind of hockey tournament, Cahill said. They wanted to help out their neighborhood.

“We’d do anything to help people from around here,’’ he said.

This year, the Baker family’s story struck a chord with the three young men. Not only did the death of Michael Baker, who took his own life, reverberate around the neighborhood, but shortly after his death, doctors told Kristine that she had colon cancer. Though her sister’s cancer is in remission, Murray-Walsh said the series of events still afflicts the family.

“We’re picking up the pieces and moving along as best we can,’’ she said.

On the eve of the tournament, imagining the family’s pain kept Galvin awake.

“I couldn’t sleep last night,’’ he said, his eyes welling up.

The cause, Sweeney said, seems to have gripped others in the community, too. The tournament, which runs through Sunday, has more than 60 corporate and family sponsors this year and, between T-shirt sales, donations, raffles, and teams’ entry fees, Sweeney said, he hopes to raise about $13,000.

It has become bigger than the trio of friends ever imagined. “It kind of blew up,’’ Sweeney said.

But Murray-Walsh isn’t surprised. She grew up in Dorchester and, she said, this kind of support is why she never left.

“This isn’t what people think about when they think about Dorchester,’’ she said. “But this is the first thing I think about.’’

Reis Thebault can be reached at reis.thebault@globe.com. Follow him on Twitter at @reisthebault.