August 6, 2017: General view of the shoes worn by Monster Energy NASCAR Cup Series driver Dale Earnhardt Jr. #88 prior to qualifying the Monster Energy NASCAR Cup Series I Love NY

Dale Earnhardt Jr. estimates 20-25 concussions in NASCAR career, reveals fears of dying – Orlando Sentinel

Monster shoes hi-res stock photography and images - Alamy

2017 #88 Cup team paint schemes - Jayski's NASCAR Silly Season Site

Nascar racetrack hi-res stock photography and images - Page 18 - Alamy

In Pictures: 2017 Monster Energy NASCAR Cup Series Darlington Throwbacks – Motorsports Tribune

Dale Earnhardt Jr. sets record for best-selling NASCAR die-cast

View in watkins glen hi-res stock photography and images - Page 2 - Alamy

Nascar racetrack hi-res stock photography and images - Page 18 - Alamy

Dale Earnhardt Jr. tells the hilarious story of the time his dad threw a shoe at him

2017 #88 Cup team paint schemes - Jayski's NASCAR Silly Season Site

2017 #88 Cup team paint schemes - Jayski's NASCAR Silly Season Site

Coast Resorts Open Roads Forum: Around the Campfire: Nascar Follies

Dale Earnhardt Jr. explains the point of his in-car eye test after his Daytona 500 crash