The draw was a traditional pill pull in which horses' entries are pulled at the same time as a numbered pill to determine what stall a horse will break from the starting gate.
If all 20 horses start, the $2,219,600 purse would be the richest since 2005, when the Derby first became a guaranteed $2 million event. The winner earns $1,459,600. Post time is 6:24 p.m. EDT.
AP Racing Writer Beth Harris contributed to this report.
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