The San Francisco Warriors drafted Johnson in the 6th round of the 1971 NBA draft. The 6-foot-0, 170-pound point guard played with the Warriors for five seasons and part of a sixth until he was waived in early January 1978. Johnson was a member of the 1974–75 Warriors NBA championship team.
After his release, Johnson was signed by the Washington Bullets in January, 1978, after a season-ending injury to Phil Chenier. Johnson averaged 8.3 points, 2.4 rebounds and 2.1 assists as a member of the 1977–78NBA Championship team.
Elvin Hayes attributed the Bullets championship run to the acquisition of Johnson.[1] In the last four games of the 1978 NBA finals against the Seattle SuperSonics, Johnson scored 80 points and helped Washington win the series 4 games to 3. The Bullets topped the Atlanta Hawks, San Antonio Spurs and Philadelphia 76ers to reach the championship round.
Johnson died of cancer on June 1, 2007, aged 58.[2]