Baffert had been relieved on Wednesday after American Pharoah drew the No. 18 starting spot because it figured to give the colt room to maneuver apart from the logjam of a 20-horse field.
But now all entries who held positions 12-20 move in a spot.
That puts American Pharoah at No. 17, from which no horse has ever won the Derby.
Baffert, a three-time Derby winner, knows the history and had joked on Wednesday that he wanted to avoid the spot.