There were those who put on the fire suits, got to be among the big boys, but when it came time to go they might have been best suited to go down the road instead of the track. Instead of being competitors, they were lucky to be participants, saddled in entries that had no hope of being anywhere near the front.
This grading system is pretty basic. Top 10’s, with extra consideration given for wins and Top 5’s, can help you earn an A+. Keep it in the Top 20 each race and that is worth a B. Just by finishing 30th each time out and that would still get you a C-. Less than that is a failure; a failure to compete, a failure to get noticed.