In Pixar's Cars, the retired racer revealed as the local judge and town doctor is Doc Hudson.
Doc initially appears to be a stern Hudson Hornet living quietly in Radiator Springs. He judges McQueen after the road-damage incident and orders him to repair the damaged pavement. Later, McQueen discovers that Doc once had a celebrated racing career.
Doc was a three-time Piston Cup champion and a member of the Fabulous Hudson Hornets. His racing career ended after a crash caused him to be treated as obsolete, despite his exceptional record.
The character is voiced by Paul Newman, whose performance was one of the film's most celebrated elements. Doc's story explains why he resists publicity and why he eventually becomes an important mentor to McQueen.