Denny Hamlin will miss inaugural Cup Series race at Mexico City

Hamlin has won three races this season and is currently third in the Cup Series standings after his win in Sunday's race at Michigan. While he and Joe Gibbs Racing will need to apply for a waiver in order for Hamlin to still be playoff eligible, it will almost certainly be granted, as NASCAR notes medical exemptions, including the birth of a child, as an acceptable reason for a driver to miss a race. 

"We are happy to announce the birth of our son," Hamlin said in a social media post. "Everyone is doing well. My main priority is to be here at home for Jordan and our family over the next few days when she is able to go home and we will transition to life as a family of five."

As far as Truex is concerned, the 33-year-old is a three-time winner in the NASCAR Xfinity Series. While he hasn't made a Cup Series start since 2014, he does serve as JGR's main reserve driver. 

Sunday's Viva Mexico 250 is scheduled for 3 p.m. ET, with coverage on Prime Video, MRN and SiriusXM NASCAR Radio.