Doc Hudson is the former racing champion who runs the Radiator Springs clinic in Pixar’s Cars.
Doc is a Hudson Hornet and the town’s respected physician. Before settling in Radiator Springs, he was a celebrated racer known as the Fabulous Hudson Hornet. His racing career ended after a crash, and he became wary of the attention and treatment he received from the racing world.
Doc initially resents Lightning McQueen’s careless behavior and refuses to celebrate modern racing culture. His history is gradually revealed as McQueen learns more about him and the town. The character is a fictional vehicle, but his Fabulous Hudson Hornet identity reflects the real Hudson Hornet’s importance in early stock-car racing.
The King and Strip Weathers are the same character, not separate answers. Sheriff is another Radiator Springs resident, but he is responsible for law enforcement rather than the clinic.