Knox was a co-founder of Park Place Productions with Troy Lyndon in 1989, which produced such classic video games as John Madden Football and Muhammad Ali Heavyweight Boxing.
A woman, who lived in the area, introduced Knox to the fledgling video game industry.
At the time, Park Place Productions was one of the largest independent software development companies in North America.
[1] Other notable productions included Batman Returns, Monday Night Football and Muhammad Ali Heavyweight Boxing.
[1] Knox and Lyndon received the Inc. Magazine's "Entrepreneur of the Year" award by Ernst & Young and Merrill Lynch for the software industry category for the Greater San Diego Country region in 1993.