PITTSBURGH — Dwight White, the Steel Curtain defensive end known as "Mad Dog" who helped lead the Pittsburgh Steelers to four Super Bowl titles in the 1970s, died following surgery. He was 58.

He died at a Pittsburgh hospital, the team said Friday. The cause was not disclosed.

White is the second member of the original four-man Steel Curtain to die this year. Defensive tackle Ernie Holmes died Jan. 17 in a car accident in Texas.

White, a two-time Pro Bowl player, was chosen as one of the 33 members of the Steelers' 75th anniversary all-time team last season.

White was best known for climbing out of a hospital bed to play in the Steelers' first Super Bowl victory, 16-6 over the Minnesota Vikings in 1975. White lost 18 pounds after being diagnosed with pneumonia and a lung infection, yet played nearly the entire game.

Funeral services are scheduled for Wednesday in Pittsburgh.

SURGERY FOR BRONCOS' NALEN: Denver center Tom Nalen had arthroscopic surgery on his left knee Friday and the Broncos expect him to be ready for training camp in July.

"Anybody having a scope should be able to play within two weeks," coach Mike Shanahan said. "Where we're at right now and the shape Tom is in, he should be full speed by the time we go to camp in July."

The 14-year veteran has played in 194 games, including 188 starts. Only two Broncos have played in more: kicker Jason Elam, now with the Falcons, who played in 236 games, and retired quarterback John Elway, who played in 234.

SENSABAUGH APOLOGIZES: Jaguars safety Gerald Sensabaugh apologized Friday for his second arrest in 14 months and contradicted a police report that said he was "doing wheelies" on a motorcycle. Sensabaugh was arrested May 30 in his hometown of Kingsport, Tenn., and charged with reckless driving. He was released on a $500 bond and given a July 22 court date. Sensabaugh acknowledged Friday that he was speeding, but said he wasn't doing any motorcycle stunts. "I was taking my bike to storage at a friend's house," he said. "I guess I was running too fast. I wasn't doing a wheelie or anything." It was Sensabaugh's second driving arrest in a little more than a year, and both came in Kingsport and included the same arresting officer.

RAIDERS SIGN MCFADDEN: The Oakland Raiders signed running back Darren McFadden to a $60 million, six-year contract, making sure their first-round draft pick will be in training camp after JaMarcus Russell's protracted holdout last year. "I'm very happy to have it out of the way," McFadden said at a news conference. "Because like coach said, I want to be in training camp. I want to be out there practicing and learning plays. Missing a day of training camp is like missing a week of college practices. It would be a major setback for me." McFadden, who finished second in the Heisman Trophy voting in each of the last two seasons, will be guaranteed $26 million as the fourth pick in the draft, said his agent, Ian Greengross.

DEATH RULED A SUICIDE: A convicted steroids dealer who claimed to have sold drugs to pro football players killed himself, the Dallas County medical examiner said Friday. Plano police found David Jacobs, 35, and Amanda Jo Earhart-Savell, 30, dead of gunshot wounds Thursday in Jacobs' Plano home. The medical examiner said Jacobs suffered a self-inflicted gunshot wound to the abdomen and the head. Authorities said Earhart-Savell was shot several times, but they issued no ruling whether it was a suicide or homicide. Earhart-Savell was a professional fitness competitor.