It happened Saturday night around 9:30 p.m. on Highway 99, near Avenue 12. CHP officials said the man, whose identity is unknown at this time, was walking on the freeway when the accident happened.
Authorities say at least four cars hit the victim who was declared dead on scene.
One of the cars lost control and rolled over after hitting the victim, but the driver is expected to be okay. No other injuries were reported.
Investigators are currently working to figure out why the man was walking on the highway.