Authorities say the newly reported cases occurred in Antioch.
Police have released a sketch of the man. He is described as in his 30s with black hair and of Middle Eastern descent with bulging eyes.
The attack happened in the victim's home with her grandmother and brother present. The man ran away after she screamed.
The suspect was last seen driving a newer model, silver Toyota Camry.
Investigators say the suspect went to the victim's house after she entered a drawing for a free massage. They believe he may have posted ads for free massages at other locations.