SAN JOSE — John Johnson, a two-time NBA All-Star and part of the Seattle SuperSonics’ championship team in 1979, has died, a family member said Friday.

Johnson, 68, died at home this week, according to his godson, John Herndon. The cause of death was not yet known.

“He just didn’t wake up,” Herndon said.

Johnson had been living in San Jose for the last several years. He had moved from the Seattle area when his son, Mitch, was recruited to play basketball at Stanford. Mitch Johnson played four seasons at Stanford, ending in 2008.

John Johnson played 12 seasons in the NBA after being drafted seventh overall by Cleveland. He also played for Portland and Houston before joining the Sonics in 1977. He retired after the 1982 season with a career scoring average of 12.9 points. He was an All-Star in 1971 and 1972.

He played collegiately at Iowa, where he set the Hawkeyes’ single season scoring record as a senior when he averaged 27.9 points. He and star teammate Fred Brown, both of whom spent their high school years in Milwaukee, Wisconsin, were reunited on the SuperSonics team.