Simplify the following text for a Grade 9 native English-speaking person.
Original: That year , he served as editor for Our Sports magazine , a periodical focusing on Negro sports issues ; contributions to the magazine included an article on golf course segregation by Robinson 's old friend Joe Louis .
Simplified: This was a magazine that focused on Negro sports issues . Contributions to the magazine included an article on golf course segregation by Robinson 's old friend Joe Louis .