Doc Hudson wins the Piston Cup three times in Pixar’s Cars.
Before becoming Radiator Springs’ doctor and judge, Doc raced as the Fabulous Hudson Hornet. His accomplishments made him one of the most respected racers of his era. The film later reveals that Doc’s career ended after a crash and that the racing world moved on without giving him the recovery or recognition he wanted.
Lightning McQueen initially knows Doc only as an older local car. When Lightning discovers Doc’s racing history, he understands that Doc’s stern attitude comes from painful personal experience rather than simple dislike of racing. Doc eventually becomes Lightning’s mentor and crew chief.
The Piston Cup is a fictional championship within the Cars universe. It is not the same event as the World Grand Prix in Cars 2, which takes place across international races. The name also echoes real stock-car racing terminology, helping the fictional competition feel familiar to audiences.