a coined expression meaning to take one participant off the
list of contestants in a race or
event; to disqualify.
Track sheet is probably a variation of scratch
sheet, which, in horse racing, is a daily publication that gives betting
information on the races taking
place that
day, including
data on any cancellations of horses. When an entrant to a race is withdrawn for whatever
reason and will not be competing, he is said to be "scratched."