He died Tuesday in Charlotte, N.C., where he had been hospitalized since Dec. 26 because of complications from his treatment. He was 65.
"Benny Parsons was a true champion both on the race track and in life," NASCAR chairman Brian France said. "Benny loved our sport and the people that make it up and those people loved him. He will be remembered as being a great ambassador for the sport."
The 1973 NASCAR champion, Parsons was a member of NASCAR's 50 greatest drivers and a lovable fixture at the track. He won 21 races, including the 1975 Daytona 500, and 20 poles. He was the first Cup competitor to qualify for a race faster than 200 mph, going 200.176 mph at the 1982 Winston 500 at Talladega (Ala.) Superspeedway.
He retired from racing in 1988 and entered broadcasting, where his folksy style and straight-shooting manner endeared him to fans and drivers. Sometimes referred to as "The Professor" because of his relaxed ability to deliver information, Parsons spent the past six years as an NBC and TNT commentator and continued to call races from the booth during his treatment.
"When you talked to him he brought out the human element," said Michael Waltrip, who tested this week at Daytona International Speedway in a car that had "We Love You, BP" painted on the side.
"The cars are nuts and bolts, but he talked through that. He was able to deliver to the people. He just tried to be passionate about what he believed and he did a great job of explaining what people were seeing."
Parsons was diagnosed with cancer in his left lung in July. Parsons, who quit smoking in 1978, underwent chemotherapy and radiation treatments and was declared cancer-free in October. But the treatment cost Parsons the use of his left lung, and he was hospitalized last month when doctors found a blood clot in his right lung. He was placed in an induced-coma.
Known throughout NASCAR as "BP," Parsons hosted a weekly radio program and kept fans updated on his condition in a blog on his Web site.
"As my radiation oncologist told me today, John Wayne lived and had a great career with one lung. There is no reason why I can't do the same." Parsons said in a Dec. 18 entry after learning of the damage to his left lung.
"If given a choice between cancer or losing a lung I would say that I got the right end of the deal," he added.
That feisty spirit was one of Parsons' trademarks, carrying him from a poor childhood in Wilkes County, N.C., to a job driving taxis and then to the top of NASCAR. Long after his retirement, he was a popular figure with the fans and driving community.
"Benny Parsons was the kindest, sweetest, most considerate person I have ever known," said Darrell Waltrip, a three-time NASCAR champion. "He was almost too nice to be a race car driver, and I say that as a compliment. In my 30 odd years of racing Benny Parsons, I never knew of anyone being mad at Benny."
Parsons was always on the lookout for new talent, and proved to have a keen eye when he discovered Greg Biffle and urged car owner Jack Roush to hire him sight unseen. Biffle went on to win championships in NASCAR's Truck and Busch Series and is now a top Nextel Cup driver.
"It's obvious he's the only reason why I am here in this sport," Biffle said. "I would still be in Washington racing local stuff if not for BP."
Parsons' death comes eight days after former Truck Series champion Bobby Hamilton lost his battle with cancer.
Born July 12, 1941 at a rural home that lacked running water and electricity, Parsons was raised by his great-grandmother near the community called Parsonsville. He eventually moved to Detroit, where he worked at a gas station and a cab company owned by his father. After winning ARCA titles in 1968-69, he returned to North Carolina in Ellerbe to become a full-time racer, often listing "taxicab driver" as his occupation on entry forms.
Parsons made 526 starts from 1964 until his 1988 retirement. He ended his career with 283 top-10 finishes, led at least one lap in 192 races and finished no lower than fifth in the points from 1972 to 1980 while earning more than $4 million.
His 1973 championship season was built on endurance and consistency: He won only one of the 28 races that season while second-place finisher Cale Yarborough won four times and David Pearson won 11. But Parsons finished the most miles that year to claim the crown.
He was honored as one of NASCAR's 50 greatest drivers in 1998, and was inducted into the International Motorsports Hall of Fame in 1994. He was inducted into the National Motorsports Press Association's Stock Car Racing Hall of Fame in 1995.
Parsons began broadcasting in the 1980s as a pit reporter for ESPN and TBS, when he was still racing a partial schedule. He moved into the booth for good in 1989 for ESPN and won a Cable ACE Award for best sports analyst in his first season in the booth. He also created the popular ESPN segment "Buffet Benny" on food available at race tracks.
"Benny was a beloved and widely respected member of the NASCAR community, and of the NBC Sports family," NBC Sports chairman Dick Ebersol said.
"He was a great driver and a terrific broadcaster, but above anything else he was a kind and generous human being," he said. "His character and spirit will define how he is remembered by all of us."
Survivors include wife Terri, sons Kevin and Keith, a former sports writer for The Associated Press, and two granddaughters. Parsons was preceded in death by his first wife, Connie.