And they're off:

The race to replace Mayor Bob Filner is underway. Today, August 26, four candidates filed with the City Clerk's Office to run for Mayor of San Diego.

Air Force veteran and first-time candidate Kurt Schwab was one of the four people to file a statement of organization to start their campaign. According to a May 2012 report by the local NBC affiliate, since returning from the Middle East, Schwab suffered bouts of depression as a result of severe Post-Traumatic Stress Disorder.

"When I came home I had no family backing, no friends, I didn't have a job. I was afraid to go out and talk to people - I was afraid that I might bother them, so I stayed inside," said Schwab in his interview with NBC.

Also entering the race is Jared Benjamin Mimms, owner of a Biotech firm in La Jolla, according to his LinkedIn profile.

Next up on the list is self-proclaimed Libertarian, Mark Schwartz. According to Schwartz's campaign profile, the only one of the four to have one, Schwartz wants to bring "honor and integrity to the office of Mayor. I stand for freedom, peace and self-reliance."

Last on the new list of filers is David Tasem, a tax-preparer in San Diego County.

The newcomers to the race, four days before Mayor Bob Filner is set to leave office, joins former assemblymember and mayoral candidate Nathan Fletcher and Tobiah Pettus. More are sure to come.