The person is described as male and probably in his 30s, standing about 6-foot-2 and weighing over 350 pounds.
He was found unconscious at 170 Pacific Ave. on Friday night.
Anyone with information about the person's identity is urged to call (628) 206-8063, or email Brent Andrew at brent.andrew@sfdph.org.
Stay with ABC7 News on this developing story