The post draw is especially significant in the Kentucky Derby because of the field’s size. With 20 horses expected to race, getting stuck on the far inside or outside can affect even the most favored horses.

MORE: Kentucky Derby records, all-time leaders | Full TV times, schedule

The entry box closes Wednesday morning and the field is limited to 20 horses based on points earned in 35 prep races leading up to the Kentucky Derby.

Trainer Bob Baffert is sending the two favorites to post — American Pharoah (3-1) and Dortmund (4-1). Todd Pletcher will also send a pair of contenders in Carpe Diem and Materiality, both listed at 12-1 by Wynn Las Vegas.