San Jose police Officer Jose Garcia says it was a miracle that the man was found unconscious but alive Tuesday.
KTVU-TV reports 25-year-old Michael Sanchez is in critical condition at a hospital.
Sanchez was reported missing by his family when he failed to show up for a funeral on May 10. He was last seen on May 8, the same day that investigators say his car was towed after a single-vehicle rollover near a busy freeway. No one was in the car.
Detectives went to the crash site Tuesday and found the man in a dense thicket of brush and trees between the freeway ramps.