Investigators say 27-year-old Smiley Martin was found at the scene on K and 10th Streets early Sunday morning, suffering from multiple gunshot wounds.
He was taken to the hospital for treatment but is expected to recover.
Officials say they identified Martin as a "person of interest" in the shooting. Detectives arrested Martin on Tuesday morning.
He remains at the hospital but will be taken to the Sacramento County jail once released on weapons charges.
Police say Martin is the brother of 26-year-old Dandrae Martin, who was arrested Monday as a "related suspect" on charges of assault with a deadly weapon and being a convict carrying a loaded gun.
Police said they booked Dandrae Martin, 26, as a "related suspect" on charges of assault with a deadly weapon and being a convict carrying a loaded gun. Detectives and SWAT team members found one handgun during searches of three homes in the area.