Police spokesman Sgt. Kerry Harris said a motorist called police at 5:43 a.m. to report seeing a person lying on the side of the roadway west of Highway 17.
An officer responded and was using a spotlight to search for the person in the eastbound lanes while he was driving west on Highway 9, Harris said.
That is when he saw a man walk into the roadway from the north side of the street, but he could not stop his car in time, and hit the person, according to Harris.
The man was transported to Santa Clara Valley Medical Center.
Harris said the man, a Los Gatos resident, appeared to be intoxicated, but was conscious and communicating with staff at the hospital.
He did not know the man's condition or the extent of his injuries.
There is no crosswalk in that area, and police have not yet determined what the man was doing in the roadway, Harris said.
Officers believe he is the same man who was reportedly lying in the roadway, as they found no one else in the area, Harris said.
Per department protocol, anytime a Los Gatos-Monte Sereno police car is involved in an injury accident, the CHP is asked to investigate the accident.
Westbound Highway 9 was closed for the investigation until shortly after 7 a.m.