Originally written on Tireball.com  |  Last updated 9/1/14

LAS VEGAS - DECEMBER 03: NASCAR driver Dale Earnhardt Jr. speaks during the NASCAR Sprint Cup Series Champions Week NMPA Myers Brothers Awards at the Venetian Resort Hotel & Casino on December 3, 2009 in Las Vegas, Nevada. (Photo by Chris Trotman/Getty Images for NASCAR)
Chris Graythen – Getty Images for NASCAR Last season Dale Earnhardt Jr. suffered a concussion that made him miss two races in the NASCAR Sprint Cup Series Chase, afterwards, some drivers came out to say they had suffered concussions as well throughout different parts of their racing career and it is expected other drivers have kept their concussions secret. Jeff Gordon himself said if the championship was on the line – that he would not mention having a concussion. Now NASCAR is looking into making concussion testing a mandatory part of the pre-season physical in an effort to diagnose a drivers ability to function in the race car. Vice president of race operations Steve O’Donnell told ESPN.com on Thursday that drivers are being encouraged to take the ImPACT (Immediate Post-Concussion Assessment and Cognitive Testing) baseline test on a voluntary basis this year with plans to become mandatory by next season. O’Donnell said the decision to move forward with baseline testing came after...
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