J.D. Gibbs, the son of former Washington Redskins coach Joe Gibbs and president of Joe Gibbs Racing, is undergoing treatment for “symptoms impacting areas of brain function,” the racing team announced Wednesday.

JGR added that the elder son of the Hall of Fame coach and NASCAR team owner “has undergone a series of tests after experiencing a gradual onset of symptoms that include speech and processing issues.” Meanwhile, he is expected to continue most of the day-to-day functions at the team’s Huntersville, N.C., headquarters.

“Gibbs’ doctors believe the complications he has experienced were triggered by head injuries likely suffered earlier in life, but no specific injury was referenced or identified,” JGR stated. Gibbs, 46, has been active in a number of sports including auto racing, mountain biking, snowboarding, football and extreme sports. JGR said he would be having more tests and treatments, which will limit his presence at tracks.

“All members of the NASCAR and France family extend our thoughts and prayers to J.D. Gibbs and his loved ones,” NASCAR Chairman and Chief Executive Officer Brian France said in a statement. “We’ve all watched J.D. grow up within our community, and he always has represented himself, his family, the entire Joe Gibbs Racing organization and NASCAR with the utmost professionalism, enthusiasm and energy. We wish him the best during this time and eagerly anticipate his recovery.”

The youngest of J.D. Gibbs’ four sons, Taylor, underwent treatment for leukemia at the age of 2, when his grandfather was in his second stint as Redskins coach. His brave battle was, in part, a reason his grandfather resigned in 2008 and, after three years of chemotherapy, Taylor went into remission. J.D. and wife, Melissa, now host Taylor’s Finish Line Festival at Charlotte Motor Speedway to benefit the Make-A-Wish Foundation and Levine Children’s Hospital.

Both J.D. Gibbs and his younger brother, Coy, played college football and tried auto racing afterward. Of the two, Coy played the higher-caliber football and stuck with auto racing longer.

J.D. played football for William and Mary, lining up as a defensive back and quarterback during his four seasons. After graduation, he dabbled in auto racing, making five starts in NASCAR’s Xfinity Series (then known as the Busch Grand National Series) and eight starts in NASCAR’s Truck series, while serving as president of Joe Gibbs Racing. He never competed full-time on any racing circuit. He was named president of JGR in 1997 and led its expansion from a one-car team into a NASCAR power with more than 500 employees.

Coy, now 42, was a linebacker at Stanford and tried to make a career of auto racing after graduation. He raced under the Joe Gibbs umbrella for three full seasons in NASCAR’s second- and third-tier professional divisions, making 58 starts in the Truck Series (2000-2002) and 39 starts in the Xfinity series (2002-03).