Hall of Fame running back Tony Dorsett, diagnosed with signs of chronic traumatic encephalopathy in 2014, said he does not regret his 12 years in the NFL even though it’s “unfortunate that I’m going through what I’m going through.”

Dorsett talked Sunday about his frustration with CTE, a degenerative brain disease linked to head trauma, and his determination to find a cure.

Dorsett, 60, told Dallas radio station 1310 The Ticket that he sometimes forgets simple things like how to get somewhere he has been many times.

“It’s very frustrating at times for me,” Dorsett said. “I’ve got a good team of people around me — my wife and kids — who work with me.”

Dorsett, the No. 2 overall pick in the 1977 draft, ranks eighth on the NFL’s career rushing list, with 12,739 yards. He was inducted into the Hall of Fame in 1994.

“I signed up for this when, I guess, I started playing football so many years ago,” he said. “But, obviously, not knowing that the end was going to be like this. But I love the game. The game was good to me. It’s just unfortunate that I’m going through what I’m going through.”

CTE’s symptoms include memory loss, aggression, dementia and depression. The disease has been discovered in the brains of many former NFL players after their deaths and has been suspected as the instigator in the suicides of former NFL stars Junior Seau and Dave Duerson, among others.

Dorsett is among more than 4,500 plaintiffs in a class-action lawsuit against the NFL that is close to being settled for about $1 billion. The lawsuit argued that the NFL had concealed a link between football and brain damage. In the settlement, the NFL did not admit culpability.

Last year, Dorsett and several other former players took part in a UCLA study aimed at finding signs of CTE in living patients. Dorsett was told he had signs.

“I’m in the fight, man,” Dorsett told The Ticket on Sunday. “I’m not just laying around letting this overtake me. I’m fighting. I’m in the battle. I’m hoping we can reverse this thing somehow.”