NASCAR has changed its championship format several times over the years. Each version reflected the sport’s growth, ...

Here are the five best moments from NASCAR's playoff system that was in use from 2014-25.

NASCAR had only recommended the testing this season, but indicated to drivers that a preseason baseline screening could become mandatory as early as 2014. The baseline test will be compared with test ...

Part of what NASCAR was attempting to do with its elimination-style playoff format that was used from 2014-25 was create ...

Without getting too into the weeds of every little change, here's a simplified rundown of each system that NASCAR has ...