Dale Earnhardt Jr. is donating his brain to science

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Dale Earnhardt Jr. Out 2 Races After Suffering A Concussion

With several efforts being made to make pro sports safer for athletes, many people have stepped up with major contributions to the cause. Add Dale Earnhardt Jr. to that list.

The NASCAR star revealed on Twitter that he will be donating his brain for concussion research.

The tweet came as part of a casual chat with a an who was responding to a Sports Illustrated news article about former Raiders players donating their brains in the light of Ken Stabler's CTE diagnosis. The fan responded by saying it was a "big commitment," to which Earnhardt responded by asking "why?"

Earnhardt's contribution should go a long way in discovering how dangerous NASCAR is for its drivers, and what precautions the sport can employ to make it safer.

Earnhardt suffered two concussions in 2012 and missed two races after attempting to hide his symptoms. NACAR implemented baseline concussion testing for all of its drivers two years later.

- By John Dorn

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Dale Earnhardt Jr. - Martinsville Speedway
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Dale Earnhardt Jr. is donating his brain to science
Dale Earnhardt Jr., center, and his girlfriend Amy Reimann, right, and team owner, Rick Hendrick, left, celebrate after Earnhardt won the NASCAR Sprint Cup Series auto race at Martinsville Speedway in Martinsville, Va., Sunday, Oct. 26, 2014. The grandfather clock, background, is the winner's trophy. (AP Photo/Don Petersen)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, poses with the winner's trophy in Victory Lane after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Robert Laberge/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, right, is embraced by Tony Stewart, driver of the #14 Bass Pro Shops / Mobil 1 Chevrolet, after Earnhardt Jr's victory in the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Robert Laberge/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, right, is embraced by Tony Stewart, driver of the #14 Bass Pro Shops / Mobil 1 Chevrolet, after Earnhardt Jr's victory in the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Robert Laberge/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, right, and crew chief Steve Letarte, take a selfie with the trophy after their victory in the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jonathan Moore/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Chris Trotman/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, takes the checkered flag to win during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Chris Trotman/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, right, and crew chief Steve Letarte pose with the trophy in Victory Lane after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jonathan Moore/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with girlfriend Amy Reimann in Victory Lane after his victory in the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jeff Zelevansky/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jonathan Moore/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jonathan Moore/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jonathan Moore/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jonathan Moore/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jeff Zelevansky/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with owner Rick Hendrick, right, after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jeff Zelevansky/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with owner Rick Hendrick, right, after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jeff Zelevansky/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jeff Zelevansky/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, applies the winners decal in Victory Lane after his victory in the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Clint Bowyer, driver of the #15 AAA Insurance Toyota, races Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jared C. Tilton/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with his team after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jeff Zelevansky/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with a burnout after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Brian Lawdermilk/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Rainier Ehrhardt/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with a burnout after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Brian Lawdermilk/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with the checkered flag after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Brian Lawdermilk/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jeff Zelevansky/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, applies the winners decal in Victory Lane after his victory in the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Robert Laberge/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Brian Lawdermilk/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jeff Zelevansky/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Chris Trotman/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Chris Trotman/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with a victory lap after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jared C. Tilton/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane with champagne after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, takes the checkered flag to win the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with a burnout in front of his team after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jared C. Tilton/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with a burnout after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jared C. Tilton/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with his team after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with a burnout after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, takes the checkered flag to win the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Rainier Ehrhardt/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with a burnout after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Rainier Ehrhardt/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates with a burnout after winning the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Sarah Glenn/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Robert Laberge/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, celebrates in Victory Lane after winning during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jonathan Moore/Getty Images)
Dale Earnhardt Jr. does a burnout as he celebrates after winning the NASCAR Sprint Cup Series auto race at Martinsville Speedway in Martinsville, Va., Sunday, Oct. 26, 2014. (AP Photo/Don Petersen)
Dale Earnhardt Jr. celebrates winning the NASCAR Sprint Cup Series auto race with team owner Rick Hendrick, front right, in Victory Lane at Martinsville Speedway in Martinsville, Va., Sunday, Oct. 26, 2014. (AP Photo/Steve Helber)
Dale Earnhardt Jr., center, celebrates after winning the NASCAR Sprint Cup Series auto race at Martinsville Speedway in Martinsville, Va., Sunday, Oct. 26, 2014. (AP Photo/Steve Helber)
Dale Earnhardt Jr. during drive introductions for the NASCAR Sprint Cup Series auto race at Martinsville Speedway in Martinsville, Va., Sunday, Oct. 26, 2014.(AP Photo/Steve Helber)
Dale Earnhardt Jr. celebrates after winning the NASCAR Sprint Cup Series auto race at Martinsville Speedway in Martinsville, Va., Sunday, Oct. 26, 2014. (AP Photo/Steve Helber)
Dale Earnhardt Jr. celebrates after winning the NASCAR Sprint Cup Series auto race at Martinsville Speedway in Martinsville, Va., Sunday, Oct. 26, 2014. (AP Photo/Steve Helber)
Dale Earnhardt Jr., center, celebrates with his pit crew after winning the NASCAR Sprint Cup Series auto race at Martinsville Speedway in Martinsville, Va., Sunday, Oct. 26, 2014. (AP Photo/Steve Helber)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, and Jeff Gordon, driver of the #24 Drive To End Hunger Chevrolet, lead the field on a restart during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Rainier Ehrhardt/NASCAR via Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, takes part in pre-race ceremonies for the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Brian Lawdermilk/Getty Images)
Dale Earnhardt Jr., right, poses with NASCAR legend Junior Johnson in the media center prior to the start of the NASCAR Sprint Cup Series auto race at the Martinsville Speedway in Martinsville, Va., Sunday, Oct. 26, 2014. Earnhardt announced a Goody's sponsorship of his car next year. (AP Photo/Steve Helber)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, leads a pack of cars during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Brian Lawdermilk/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, races Clint Bowyer, driver of the #15 AAA Insurance Toyota, during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jared C. Tilton/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, races Clint Bowyer, driver of the #15 AAA Insurance Toyota, during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jared C. Tilton/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, pits during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Chris Trotman/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, leads Tony Stewart, driver of the #14 Bass Pro Shops / Mobil 1 Chevrolet, during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Jared C. Tilton/Getty Images)
MARTINSVILLE, VA - OCTOBER 26: Matt Kenseth, driver of the #20 Dollar General Toyota, and Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, lead a pack of cars during the NASCAR Sprint Cup Series Goody's Headache Relief Shot 500 at Martinsville Speedway on October 26, 2014 in Martinsville, Virginia. (Photo by Robert Laberge/NASCAR via Getty Images)
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