Image IN FORM Mr. Rollino at a party in Brooklyn for his 103rd birthday. He was one of the last links to the old Coney Island strongmen. Credit... Charles Denson

Among his many accomplishments, Mr. Rollino was proudest of one in particular. “My finger strength,” he told an interviewer for ESPN The Magazine. “Six hundred thirty-five pounds. See the size of it. At 150 pounds, nobody ever beat me in this world.”

He was a legend within that small Coney Island society in which few New Yorkers would want to become known as legends: the men and women who swim in the Atlantic when it is at its harshest and coldest. On a 6-degree day in January 1974, Mr. Rollino and six other members of the Iceberg Athletic Club swam into the waters off Coney Island. The freezing Atlantic was like steel: It didn’t intimidate him.

“People told me he holds the record for swimming every day for eight years,” said Louis Scarcella, 59, a former homicide detective and a member of the city’s oldest winter swimming club, the Coney Island Polar Bear Club. “He was known as the Great Joe Rollino, and he was great. You knew he was great just by standing next to him. He just had that humble confidence and strength. It shined.”

Mr. Scarcella, like many of those who knew Mr. Rollino, has a Joe Rollino story, or several Joe Rollino stories. And though some of them can be neither confirmed nor refuted, they get told and retold and told again, because they are too good not to. Mr. Scarcella heard that one winter in the 1950s, Mr. Rollino recovered the bodies of two people who drowned in Prospect Park, because the police did not have the necessary protective equipment and it was too cold for anyone else to jump in and bring them to the surface.

Image EARLY BRAWN Mr. Rollino at age 10, weighing in at 68 pounds. In his prime, he was the greatest strongman, pound for pound, one expert said.

Mr. Rollino was a longtime member of the Association of Oldetime Barbell and Strongmen. Dennis Rogers, a fellow member and a professional strongman, remembered seeing him at the association’s annual dinner in June, at a hotel near the Newark airport. “He just came in to say hi to everybody and coached some of the guys that were performing,” said Mr. Rogers, who in 1995 prevented four motorcycles from moving at full throttle for 12 seconds, according to his Web site. “He would regularly work out in the gym. He was in pretty good shape. He walked a little slow but looked fine.”