The shooting happened along Country Club Boulevard near Grange Avenue. The 7-year-old boy, Carlos, was inside an apartment, watching television.
"I heard this lady crying, saying, 'Oh my god, something, someone's been shot,'" neighbor Rick Maldonado said.
Maldonado said he ran outside after hearing the shots to see what had happened.
"I saw a little 7-year-old down there trying to catch his breath," he said.
A GoFundMe, which was set up to help Carlos' parents with his medical bills, reports "the bullet tore through his abdomen, intestines, liver, spleen, and broke his ribs." He is now at the UC Davis Medical Center in Sacramento.
Meanwhile, neighbors are hoping for the best for the boy, who did nothing to deserve what happened.
"Pretty tragic," Maldonado said. "It's always bad when an innocent kid gets hit by a stray bullet."
Carlos' family, who call him "C4," released a statement to FOX40 Monday:
"C4 (Carlos) is a very loving, kind, and goofy kid. He enjoys playing with his sister, Minecraft gaming, and making people laugh. When C4 grows up, he wants to join the Navy like his mom. Throughout this ordeal, C4 has shown incredible strength and courage. After being shot, C4’s first concern was his sisters wellbeing. Though she wasn’t physically harmed, it’s been very hard for her to feel safe having witnessed the event. We are thankful for the community support we have already received and hope everyone keep C4 in their thoughts and prayers."
Investigators do not have details on a suspect or motive. Anyone with information about the shooting is asked to contact the San Joaquin County Sheriff's Office or Crime Stoppers.