NASCAR Sr. V.P. of Racing Innovation John Probst joins Fox News Autos Editor Gary Gastelu in The Fox Garage to talk about the NASCAR NextGen Cup Series car that's set to debut at Daytona next February. Martin Truex Jr. got nervous in a hurry near the end of his dominating drive at Darlington Raceway. Barely pushed much of the race, the Joe Gibbs Racing driver suddenly saw Kyle Larson catching up in the closing laps. Martin Truex Jr. celebrates winning the NASCAR Cup Series Race at Darlington (AP) Truex, though, called on his steady demeanor and track focus to pull away for his third NASCAR Cup Series victory this season.