Raymond Lee "Friday" Hassler (July 29, 1935 – February 17, 1972)[1] was a NASCAR Grand National and Winston Cup Series driver.

At the 1971 Volunteer 500 at Bristol Motor Speedway, Hassler was a relief driver for race winner Charlie Glotzbach.

Hassler died of injuries sustained as a result of a 13 car-pileup during the first qualifying race of the 1972 Daytona 500 at the age of 36 and at the peak of his career.

Caught in the pileup, Hassler spun his No.39 Chevy into the infield grass before swerving back into the track and slammed into the outside wall head-on.

He has run an occasional super late model race at Five Flags Speedway, where his father won the Snowball.