He was nicknamed "The King" for winning the Daytona 500 and NASCAR national chanpionship seven times each during 1964-1981.
Richard Petty suffers one of the worst accidents in his NASCAR career during the 1970 Rebel 400 at Darlington. Petty dislocated his shoulder in the accident.

1970 Darlington flip
While his car is flipping over, you can actually see his head, arm and shoulder coming out of the window. It is because of this wreck, that NASCAR added a requirement for all drivers to have safety nets.