Groundskeepers at AT&T Park in San Francisco paint the World Series logo onto the field before the Giants and Texas Rangers started team workouts Tuesday. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Roy Halladay threw the second no-hitter in postseason history Wednesday, leading the Phillies over the Reds 4-0 in Game 1 of the NL division series. Mel Evan/AP hide caption

itoggle caption Mel Evan/AP

Virginia Tech's football helmets are outfitted with six sensors (the brown objects) that record data. There is also a small antenna that transmits information from the sensors to the sideline controller unit. The sensors are small accelerometers -- similar to devices that trigger an automobile air bag. Courtesy of Dr. Gunnar Brolinson of Virginia Tech hide caption

itoggle caption Courtesy of Dr. Gunnar Brolinson of Virginia Tech

Reggie Bush was all smiles when he was awarded the 2005 Heisman Trophy on Dec. 10, 2005. He called the decision to give the trophy back "heartbreaking." Stephen Chernin/Getty Images hide caption

itoggle caption Stephen Chernin/Getty Images