Hours before he was injured in a serious car accident on Saturday night, Rudolph W. Giuliani was cheering on the local baseball team.

He was not watching his beloved New York Yankees play at Yankee Stadium. He was in the stands at Delta Dental Stadium in Manchester, N.H., to support the home team, the Fisher Cats, take on the Erie SeaWolves.

Taylor Fisher, the general manager of the Fisher Cats (no relation), said he passed Mr. Giuliani, who was walking with a security guard and a woman as they made their way to seats. He instantly recognized Mr. Giuliani but did not say hello. “I let him enjoy the game,” Mr. Fisher said. (His team lost, 7-2.)

To New Yorkers, this might seem a surprising place for Mr. Giuliani, the former New York City mayor and lawyer for President Trump, to spend the Labor Day holiday. But he has been a regular in New Hampshire for years, friends and acquaintances say.

“He will gather with a group of friends and enjoy a laugh and a fine cigar,” said Scott Spradling, a former news reporter for WMUR-TV, the local ABC affiliate. “This is a place he comes to see friends and perhaps escape the headlines.”

Mr. Giuliani seems to be loosening his ties to New York. Last month, he sold his apartment on the Upper East Side for $4,975,000, according to Gary Rosen, the lawyer who represented him in the deal.