Police say Cainan Schierholtz crashed into a bicyclist, a pedestrian, a pickup truck, and a light pole -- all within minutes on the morning of august first.
Three people ended up needing medical treatment.
Cainan's brother Nate is an outfielder for the San Francisco Giants.
Cainan remains in jail, his bail has been set at $200,000.
He'll return to court next month.
