Jason Collins, who played for the Boston Celtics in 2012, signed a 10-day contract with the Brooklyn Nets on Sunday. Collins came out as gay in an article in 2013. Bruce Bennett/Getty Images hide caption

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Germany's Maria Hoefl-Riesch during the slalom run of the women's alpine skiing super-combined event at the 2014 Sochi Winter Olympics. Stefano Rellandini /Reuters/Landov hide caption

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Missouri senior defensive lineman Michael Sam speaks to the media during an NCAA college football news conference in Irving, Texas. Sam revealed in interviews on Sunday that he is gay. Brandon Wade/AP hide caption

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Seahawks quarterback Russell Wilson stiff-arms Broncos cornerback Champ Bailey on Sunday during Super Bowl XLVIII at MetLife Stadium in East Rutherford, N.J. Jeff Zelevansky/Getty Images hide caption

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Detached admiration for sporting achievement? Not on your life. It's all about allegiance and, even, love. Kevin C. Cox/Getty Images hide caption

itoggle caption Kevin C. Cox/Getty Images

Novak Djokovic of Serbia wipes the sweat from his face during his quarterfinal loss to Stanislas Wawrinka of Switzerland at the Australian Open tennis championship in Melbourne. Aaron Favila/AP hide caption

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The winning catch: Wide receiver Kelvin Benjamin of the Florida State Seminoles catches the 2-yard pass for a touchdown that put his team ahead for good with just 13 seconds left in the game. Harry How/Getty Images hide caption

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Indianapolis Colts quarterback Andrew Luck dives over the goal line in the fourth quarter of his team's 45-44 victory over the Kansas City Chiefs. David Eulitt /MCT/Landov hide caption

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Pete Rose of the National League barreled into American League catcher Ray Fosse at the 1970 All-Star Game in Cincinnati. It's one of the most famous home plate collisions in Major League Baseball history. AP hide caption

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