He was on his 1984 Harley Davidson motorcycle and heading north on Interstate 95 near Donald Ross Road in Palm Beach County when he was struck from behind by a car at about 2:50 a.m., the Florida Highway Patrol said.
Thrown from the bike, Regan ended up on the grass in the median. He was pronounced dead at the scene, said police.
“That was Jack, on the highway at 3 in the morning to be there for people he never met,” said Rick Regan, the oldest of four brothers born and raised in Boston.
Police said Regan was struck by a 2010 Lexus driven by Amanda McClure, 24, of Palm City.