I did not see a thread for this UID who was found on March 14, 2009.
As per Namus, a "Caucasian appearing male found floating in Lake Merced (San Francisco) entangled in reeds approximately 15 feet from open water and 30 feet from shore line, on east side of lake near Lake Merced Blvd. and Winston Dr."
the UID is described as being between 45-55, about 167 lbs with black hair:
no dentals are mentioned but the UID had a surgical screw implanted in his left shoulder along with an 11" scar on the left shoulder.
no rule outs are listed and there is no composite sketch at Namus.