United SportsCar Championship

The WeatherTech SportsCar Championship is a sports car racing series based in the United States and Canada and organized by the International Motor Sports Association (IMSA). It is a result of a merger between two existing North American sports car racing series, the American Le Mans Series and Rolex Sports Car Series. The initial United SportsCar Championship name of the series was announced on March 14, 2013, while Rolex SA signed their Tudor brand to a title sponsorship deal. WeatherTech later signed a deal to take over title sponsorship of the series starting in 2016, rebranding the series.