Since then NASCAR has determined its Sprint Cup champion by a playoff among the top dozen or so drivers in points over the last 10 of the year 's 36 races .
NASCAR instituted its Chase for the Cup 11 years ago .
Since then NASCAR has determined NASCAR 's Sprint Cup champion by a playoff among the top dozen or so drivers in points over the last 10 of the year 's 36 races .
NASCAR instituted its Chase for the Cup 11 years ago .