NASCAR Cup Series

The NASCAR Cup Series is the top racing series of the National Association for Stock Car Auto Racing (NASCAR), the most prestigious stock car racing series in the United States.

The series began in 1949 as the Strictly Stock Division, and from 1950 to 1970 it was known as the Grand National Division. In 1971, when the series began leasing its naming rights to the R. J. Reynolds Tobacco Company, it was referred to as the NASCAR Winston Cup Series (1971–2003). A similar deal was made with Nextel in 2003, and it became the NASCAR Nextel Cup Series (2004–2007). Sprint acquired Nextel in 2005, and in 2008 the series was renamed the NASCAR Sprint Cup Series (2008–2016). In December 2016, it was announced that Monster Energy would become the new title sponsor, and the series was renamed the Monster Energy NASCAR Cup Series (2017–2019). In 2019, NASCAR rejected Monster's offer to extend the naming rights deal beyond the end of the season. NASCAR subsequently announced its move to a new tiered sponsorship model beginning with the 2020 season similar to other U.S. based professional sports leagues, where it was simply known as the NASCAR Cup Series, with the sponsors of the series being called Premier Partners. The three Premier Partners are Busch Beer, Coca-Cola, and Xfinity.

The championship is determined by a points system, with points being awarded according to finish placement and number of laps led. The season is divided into two segments. After the first 26 races, 16 drivers, selected primarily on the basis of wins during the first 26 races, are seeded based on their total number of wins. They compete in the last ten races, where the difference in points is greatly minimized. This is called the NASCAR playoffs.

The series holds strong roots in the Southeastern United States, with about half of the races in the 36-race season being held in that region. As of 2020^[update], the schedule includes tracks from around the United States. There have been races held outside the United States with exhibition races previously held in Japan and Australia, and one-off races held in Canada and Mexico City. The Daytona 500, the most prestigious race, had a television audience of about 9.17 million U.S. viewers in 2019.

Cup Series cars are unique in automobile racing. While the engines are powerful enough to reach speeds of over 200 mph (320 km/h), their weight coupled with a relatively simple aerodynamic package (based on the body styles of cars currently available for retail sale in the United States) make for poor handling. The bodies and chassis of the cars are strictly regulated to ensure parity, and electronics are traditionally spartan in nature.

In 1949, NASCAR introduced the Strictly Stock division, after sanctioning Modified and Roadster division races in 1948. Eight races were run on seven dirt ovals and on the Daytona Beach beach/street course.

The first NASCAR "Strictly Stock" race was held at Charlotte Speedway on June 19, 1949. Jim Roper was declared the winner of that race after Glenn Dunaway was disqualified for having altered the rear springs on his car; the first series champion was Red Byron. The division was renamed "Grand National" for the 1950 season, reflecting NASCAR's intent to make the sport more professional and prestigious. It retained this name until 1971. The 1949 Strictly Stock season is regarded in NASCAR's record books as the first season of GN/Cup history. Martinsville Speedway is the only track on the 1949 schedule that remains on the current schedule.

Rather than having a fixed schedule of one race per weekend with most entrants appearing at every event, the Grand National schedule has included over sixty events in some years. Often there were two or three races on the same weekend and occasionally two races on the same day in different states.