With Champion Sports, Simon plowed much of the same ground as Strange Sports Stories with tales involving supernatural or science-fictional trappings, but there were also "realistic" tales involving sheer guts and talent. Evidently most Groovy Age sports fans preferred actually playing or watching their sports on TV, and few comicbook fans wanted to read about sports, so Champion Sports ran for only three brief issues (July-November 1973).
Simon employed a small stable of artists for his corner of the DC Universe, mainly Golden Age artists Jerry Grandenetti and Craig Flessel. I think you'll dig the team of Simon, Grandenetti, and Flessel as they tell the story of "The Kid Who Beat the Oakland A's!" from Champion Sports #1!