A.P

What a name, for a mare salvaging her sire from extinction: Unicorn Girl. Certainly the faint footprint of A. P. Five Hundred on the North American breed would otherwise, by now, have been thoroughly effaced. His eligibility to compete with other sons of A.P. Indy at stud was marginal in the first place, third place in the GII Super Derby being as good as it got in a light career. And, really, he never got off the grid. After a single spring trying his luck in Florida, in 2004, he...