The latest hat-in-the-ring belongs to Supervisor John Avalos. Fog City Journal has a report and the confirmation-text text:
"True. 4 pm today, my wife and I will go to the DoE (Department of Elections) to pull papers,” Avalos, a progressive, wrote via text this morning.'"
The entry of Avalos, a member of the progressive bloc of supes, may if nothing else short-circuit a run by Chris Daly, who said in February he might feel compelled to enter the race if fellow progs like Ross Mirkarimi, David Campos, Aaron Peskin, or Avalos stayed out.
Here's a list of official candidates so far. I leave anyone out?