Jamie McMurray mourning the death of his niece

Jamie McMurray and his family have suffered a loss in recent days.

Todd Warshaw/NASCAR via Getty Images

Chip Ganassi Racing with Felix Sabates driver Jamie McMurray is mourning the death of his niece, Lauren Montez, who passed away Sunday.

McMurray, who finished fourth in Sunday’s race at Dover International Speedway but just missed out on advancing to the next round of the Chase, sent out the following tweet on Wednesday about his family’s recent loss.

"I would like to extend a heartfelt thanks to all of the friends and fans for the thoughts and prayers to our family, following the loss of my niece Lauren, who passed away last Sunday Oct. 4.

"Lauren was the inspiration behind my becoming involved with Autism awareness and the work that we have done through the Jamie McMurray Foundation with Autism Speaks. My sister Trisha and our entire family appreciate the respect of privacy during this difficult time.

"In lieu of cards or flowers, donations can be made in honor of Lauren Montez to the Jamie McMurray Foundation at 130 Infield Court, Mooresville, NC 28117, or online at www.jamiemcmurray.com/foundation."