This year, for example, 14 of the 17 Derby starters had acceptable dosage numbers.
This year he had no Derby starters.
The scratches will affect the post positions for some Derby starters.
While not all starters will have a prerace blood test, as the Derby starters did, Raffetto said some might be spot tested.
Each race also yielded other Derby starters, but their performances failed to settle the question.
A total of thirty-six races, with the first coming last year, gave Derby starters an opportunity to accumulate points towards an entry into the race.
Zito's five Derby starters tied a record for that race.
He said that none of his Derby starters were likely to run in the Preakness.
But this year, there are at least 16 confirmed Derby starters.
The trainer Todd Pletcher will have two Derby starters.