The shooting was reported at about 10:20 p.m. in the 2700 block of McKee Road, according to Lopez.
Arriving officers found the victim suffering from at least one gunshot wound, Lopez said.
The victim was taken to a local hospital with life-threatening injuries and he was in grave condition as of 1:20 a.m. Monday, according to Lopez.
No arrests have been made, but investigators are interviewing several people who may have witnessed the shooting, Lopez said.
Anyone with information about the shooting is encouraged to contact the San Jose Police Department's homicide unit at (408) 277-5283.
Those wishing to remain anonymous can call the Silicon Valley Crime Stoppers tip line at (408) 947-STOP.