He was an All-American forward at the University of San Francisco and a first-round draft pick in the National Basketball Association (NBA) in 1965.

Johnson, A 6'7 power forward, was a 3-time All Interhigh and 2-time All MET playing for William Roundtree at Spingarn HS.

Johnson teamed with Dave Bing to win the DC Interhigh Titles in ‘60 and ‘61 and a City Championship vs DeMatha in 1961,in front of a sold-out crowd (10,500) at the U of Maryland's Cole Field House.

The Dons lost in the West regional final in consecutive years to eventual champion UCLA.

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