Members of the St. Louis Rams raise their arms to protest the grand jury decision in Ferguson, Mo., before a game last month. The players faced a backlash from St. Louis police and have been asked to apologize. L.G. Patterson/AP hide caption

itoggle caption L.G. Patterson/AP

San Antonio Spurs forward Tim Duncan celebrates with his teammates after defeating the Miami Heat in game five of the NBA finals in June. Ashley Landis/EPA/Landov hide caption

itoggle caption Ashley Landis/EPA/Landov

Florida State fans cheer Rashad Greene after a 74-yard touchdown pass in the fourth quarter of an NCAA college football game against Clemson in Tallahassee, Fla., on Sept. 20. In college sports, African-American student athletes and white student audiences are the norm. Commentator Frank Deford asks why this dynamic does not make us more squeamish. Mark Wallheiser/AP hide caption

itoggle caption Mark Wallheiser/AP