The incident happened Dec. 28 on Vermont Avenue and 165th Place, according to the Los Angeles Police Department.
The victim, identified as Thomas Michael Cavanaugh, was struck by a white sedan. The driver of that vehicle left the scene without stopping or attempting to help, police said.
Cavanaugh was taken to the hospital, where he later died.
A $50,000 reward is being offered to anyone who has information that leads to the arrest of the driver responsible.