"It kind of shattered his life," Marvelous Marvin Hagler's manager said yesterday of Hagler's reaction to his defeat in April by Sugar Ray Leonard.

"I've told him he has a long way to go in life and we want to see him happy," said Hagler's manager, Pat Petronelli. "He's been a great champion. He hasn't been a phony -- he always fought. We love the guy. We hate to see him not handling the situation . . .

"He got moody. He got depressed. He couldn't deal with it. Some people can deal with it and others can't.

"I had a feeling he was going to take it bad, but not this bad."

Since his split-decision defeat by Leonard, Hagler has maintained an even deeper seclusion than normal, and has had marital problems that have left him separated from his wife. In addition, he has been the subject of a report that unnamed friends and relatives were concerned that he was engaged in alcohol and drug abuse. Subsequently, Hagler denied using drugs and abusing alcohol.

In the wake of the Leonard fight, his first defeat in 11 years, Hagler has made himself unavailable to close friends and associates much of the time. "He always reached out for me," said Petronelli. "Now, I have to go looking for him."

Hagler's wife, Bertha, recently filed a family abuse petition seeking custody of their five children and a restraining order prohibiting Hagler access to their Hanover, Mass., home. In her complaint, according to the Associated Press, Bertha Hagler wrote, "Marvin threw me out of the house. He pushed me. He hit the car with a boulder. I am in fear of him."

Following an appearance by both Haglers at a hearing in Hingham (Mass.) District Court, an agreement was reached allowing Hagler limited visiting rights with his five children at their Hanover home, with Hagler abiding by a court order barring him from living there. The order is in effect until Sept. 30.

In addition to appearing at the hearing, Hagler gave an interview to a Boston television station after the station reported that friends and relatives of Hagler had expressed concern about his welfare. "I want to reassure the public I have no problem with drugs or alcohol," Hagler said.

Hagler admitted, however, "I'm probably drinking a bit because of my marriage problems, but not to the extent I'm overdoing it."

Hagler said that the loss to Leonard still bothered him, but that he was "trying to keep from getting down."

Hagler's earnings from the Leonard fight appear to be unprecedented. But the money clearly has not taken the sting out of the setback for Hagler.

Bob Arum, the fight's promoter, has said Hagler could make "at least $18 million." Petronelli said, "It was the greatest deal ever made."

But Petronelli expressed regret over the difficult time Hagler has gone through since the fight. He said Hagler has complained often about the judging of the fight and what Hagler considered unfair tactics employed by Leonard, such as holding but not being penalized by the referee although number of warnings were issued.

"Marvin would keep repeating these things," said Petronelli. "I said, 'It's history now. You've got to go on with your life' . . .

"Of course, Marvin felt bad after the fight. Of course, Marvin felt bad because Leonard would not give him a rematch. Things piled up."

What has appeared to matter most to Hagler is holding the middleweight championship. But both the World Boxing Association and the International Boxing Federation stripped him of their versions of the title because they did not sanction the Leonard fight. The defeat by Leonard left him without the World Boxing Council title, as well.

"Marvin's thinking always was, 'Let some kid come along and beat me,' " said Petronelli. "Not to have it end with a, 'Did he beat him or didn't he beat him?' He said he'll take this to his grave."

As for Hagler's future in the ring, Petronelli said, "He might decide he wants to go after a {championship} belt," but for now Petronelli doubts it. "The only one to get him to fight again would be Leonard."