This is a photo of Sean Sidi who suffered a brain injury recently and could be lost or injured in San Francisco.
Two separate and unrelated missing person's cases had desperate families searching several areas of San Francisco Saturday.
One of the men has been missing since running the Bay to Breakers.
Beau Rasmussen, 27, was last seen noon Sunday near the Beach Chalet Brewery and Restaurant, where his phone, credit cards and other belongings were found.
Friends say that he went to the beach by himself after the race. His family, co-workers and friends have spent the week looking for him. They had an organized search Saturday morning that included dozens of people.
The family of 21-year-old man with a brain injury is also searching in San Francisco this weekend.
Sean Sidi went missing on Tuesday, May 21 after visiting an old high school teacher in Hayes Valley.
He told his dad that he was going to "the park." His cellphone went dead late Tuesday afternoon and he has not been seen or heard from since.
Sean is Asian, 5'5", 120 lbs. He was last seen wearing a black-and-grey hooded North Face rain jacket, blue jeans and black canvas shoes. He just came out of an arm cast and was wearing a black splint on his left wrist and arm. He has braces on his teeth.
His family has posted flyers throughout Golden Gate Park and Baker Beach because that is the general area where they were able to track his cell phone.
If you have information about either of these men, please call San Francisco police.