NASCAR Driver Stats

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  • AFP - Average finish position
  • Gain Laps - Laps where position improved
  • Loss Laps - Laps where position was lost
  • Retain Laps - Laps where position was unchanged
  • Pos. Gained - Total number of positions gained on gain laps
  • Pos. Lost - Total number of positions lost on loss laps
  • Net Gained - Pos. Gained - Pos. Lost
  • GR - Gain rating - The weighted number of positions gained. The weighting is done based on the perceived difficulty of passing from a driver's current position. For example, it's for more difficult to pass from 2nd than it is from last, because the quality of car and driver is much higher at the front and there's just fewer spots to gain to begin with. The driver is assigned a score for each lap on which he or she gains a position. That score is the product of two values: the difference between the driver's starting and finishing position on that lap, and the weight of their starting position. The weight is inverse to the ordinal value of the position; something like 1/N, where N is the position. For example, 12th has a weight of 1/12 [Read more]
  • LR - Loss rating - See GR, but LR is only for laps where the driver has lost position. The weight is the inverse of their position from the back of the field, i.e. losing positions at the rear of the field results in a higher score than losing positions at the front, and thus a higher score is bad [Read more]
  • GR-LR - Net rating - The difference between the driver's GR and LR [Read more]
  • eGR-LR - Estimated net rating - An experimental approximation of GR-LR using the driver's race starting position and their race finishing position. On the Other series page, also uses the number of laps led to help in the scoring. Uses the same weighting principles as GR and LR
  • GR/LR - The ratio of GR and LR
  • RR - Retained rating - Using the same weighting principles as GR and LR, the score on laps where the driver's position has not changed. Almost a weighted average running position
  • nRT - Net retained rating - RR + GR - LR
  • Retained Ratio - (GR + RR) / LR