Soon after the advent of the modern era in 1972, the championship was decided by a more basic cumulative point total based solely upon a driver's finishing position in each race.
In order to reduce the possibility of a driver clinching before the final event, NASCAR implemented the "Chase for the Cup" in 2004 which, with minor modification from 2004 to 2013[3] and more radical changes in 2014,[4] stands as the current format.
[5] Overall, thirty-six different drivers have won the Championship,[2] with Richard Petty,[6] Dale Earnhardt,[7] and Jimmie Johnson holding the record for most titles at seven.
[9] Bill Rexford is the youngest Cup Series champion; he was 23 years, 7 months, and 15 days old when he won the title in 1950.
[10] Bobby Allison is the oldest Cup Series champion; he was 45 years, 11 months, and 17 days old when he won the championship in 1983.