Take a listen at some of the best in-car audio from STP 500 at Martinsville Speedway.

NASCAR Sprint Cup Series Rookie of the Year contender Ryan Blaney pokes fun at his best friend and NASCAR XFINITY Series driver Darrell Wallace Jr. over his University of Tennessee fandom and his recent performance practicing with the Volunteers.

Dale Earnhardt Jr. talks about the reasons behind his decision to donate his brain to concussion research.

Joey Logano talks about using the 2015 incident with Matt Kenseth as some extra motivation to perform well in the STP 500.

Kyle Busch celebrates in Victory Lane after his first career grandfather clock victory at Martinsville Speedway in the NASCAR Camping World Truck Series.

Kyle Busch celebrates in victory lane after winning the STP 500 at Martinsville Speedway.

NASCAR.com's Costner Merrifield recaps an eventful day at Martinsville Speedway that included an early spin for Dale Earnhardt Jr. and Kyle Busch holding off AJ Allmendinger to earn his first NASCAR Sprint Cup Series victory at Martinsville Speedway.

A live look at Martin Truex Jr. In Car showing that Joey Logano did not actually bump him.

Go inside the headsets of Kyle Busch, Daniel Suarez and Austin Dillon on the final lap at Auto Club Speedway as they exchange the lead three times before the checkered flag.