Chadwick Boseman's Best Performances : Pop Culture Happy Hour Chadwick Boseman is nominated for an Oscar this year for his performance in Ma Rainey's Black Bottom. It's his final onscreen role — he died of colon cancer in August. Before that, Boseman played historical figures including Thurgood Marshall, Jackie Robinson and James Brown. And of course, he joined the Marvel Cinematic Universe as Black Panther. And today we're talking about some of those essential performances.