U.S. swimmer Bradley Snyder poses with his gold medal after winning the men's 100m freestyle - S11 final at the London 2012 Paralympic Games. Ben Stansall/AFP/Getty Images hide caption

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Tatyana McFadden has won medals at the Paralympic Games in 2004 and 2008. At this year's games in London, she's participating in every wheelchair race from the 100-meter sprint to the marathon. Courtesy of Deborah McFadden hide caption

itoggle caption Courtesy of Deborah McFadden

Rob Jones and Oksana Masters will compete in adaptive rowing at the London Olympics this week. Jones is a former U.S. Marine who lost both legs to an improvised land mine in southern Afghanistan. David Gilkey/NPR hide caption

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A team of torchbearers brings the Paralympic flame through Piccadilly Circus as the torch heads across London to the Olympic Stadium. The Paralympic Games' opening ceremony will be held Wednesday at 3:30 p.m. ET. LOCOG/Getty Images hide caption

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Stephen Strasburg of the Washington Nationals pitches against the Atlanta Braves at Nationals Park last week. Patrick McDermott/Getty Images hide caption

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Doctoral student Brett Comstock wears a football uniform as he walks on a treadmill at the Korey Stringer Institute at the University of Connecticut. Craig LeMoult for NPR hide caption

itoggle caption Craig LeMoult for NPR

According to the NFL's Peter O'Reilly, fans are drawn to the Madden NFL video game franchise because it lets them experience the NFL year-round in a realistic way. EA Sports hide caption

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Serena Williams, left, and Venus Williams compete in Wimbledon at the 2012 Summer Olympics. Elise Amendola/AP hide caption

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