Nick Springer, U.S. Paralympic athlete

Nick Springer #9 of the United States in action during the Bronze Medal match of Mixed Wheelchair Rugby against Japan on day 11 of the London 2012 Paralympic Games at Basketball Arena on September 9, 2012 in London, England. The U.S. defeated Japan.

Britain's David Anthony (left) and Ross Morrison (right) close in on Nick Springer (center) of the U.S. during the pool phase group A wheelchair rugby match between Britain and the US at the London 2012 Paralympic Games at the Olympic Park Basketball Arena in east London on September 5, 2012. The U.S. won.

Nick Springer wears his wheelchair rugby gold medal at the 2008 Beijing Paralympic Games.

Nick Springer (9) of the United States celebrates after his team won in the Wheelchair Rugby match between the United States and Japan at Beijing Science and Technology University Gymnasium during day seven of the 2008 Paralympic Games on Sept. 13, 2008 in Beijing, China.

Left to right: Olivia Springer, Paralympic wheelchair rugby team gold medalist Nick Springer, and Gary Springer attend an event honoring Ben Stiller hosted by the Museum of the Moving Image at Cipriani 42nd Street Nov. 12, 2008 in New York City.

Nick Springer of the U.S. carries the ball during a game in the Wheelchair Rugby Challenge at the Lakeshore Foundation in preparation for the 2012 London Paralympic and Olympic Games, June 16, 2012 in Homewood, Ala.

Nick Springer competes in the Wheelchair Rugby match — Getty Images/Guang Niu

Nick Springer of USA competes in the Wheelchair Rugby match between USA and China at Beijing Science and Technology University Gymnasium during day six of the 2008 Paralympic Games on Sept. 12, 2008 in Beijing, China.

Team USA celebrates the wheelchair rugby gold medal at the 2008 Beijing Paralympic Games. At left is Nick Springer.

U.S. wheelchair rugby player Nick Springer in action at the 2008 Beijing Paralympic Games.

U.S. wheelchair rugby player Nick Springer celebrates at the 2008 Beijing Paralympic Games.

Wheelchair Rugby Challenge — AP Photo/The Birmingham News, Bernard Troncale

Will Groulx of the U.S., with the ball, is jammed up by Sweden's Per-Johan Uhlmann and Stefan Jansson as Nick Springer of the U.S. tries to help during a game in the Wheelchair Rugby Challenge at the Lakeshore Foundation in preparation for the 2012 London Paralympic and Olympic Games, June 16, 2012 in Homewood, Ala.