One of the most underrated drivers in NASCAR history, this driver won the Grand National Series in 1952 and 1955. Currently, he has the highest career winning percentage. What's his name?

Answer Tim Flock

Tim Flock competed in only 187 races and he managed to win 39 of them. However, he never won any crown jewel races. In fact, there's no other driver that has won this number of races but never a crown jewel.

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