He ran between 20 - 25,000 miles before 1980 , when he began recording his mileage ( 20,000 is used as estimate in listing his total mileage ) .
Dallas Robertson is also not a streak runner .
Dallas Robertson ran between 20 - 25,000 miles before 1980 , when Dallas Robertson began recording Dallas Robertson 's mileage ( 20,000 is used as estimate in listing his total mileage ) .
Dallas Robertson is also not a streak runner .