Deputies were called to the scene of the shooting near the intersection of Mims Avenue and Canal Road around 11:50 a.m., Contra Costa County Sheriff's Lt. David Hartman said.
The victim, an unidentified male, had been shot in the leg.
He was taken to a hospital with injuries that are not believed to be life-threatening.
An investigation into the shooting is underway, and the sheriff's office did not have any leads on suspects as of this afternoon, Hartman said.