You've likely heard the names of Ruby Bridges, Jackie Robinson and Thurgood Marshall — the first African Americans to desegregate public schools, baseball and the Supreme Court. But do you know the names of Kenny Washington, Woody Strode, Marion Motley or Bill Willis? Unless you're a football fan, you likely haven't. And that's what Keyshawn Johnson is trying to rectify in his book The Forgotten First, the story of the men who helped break the NFL's color barrier. NPR's A Martinez sat down with Johnson to discuss those four men, and the legacy they left behind.