It is nearly as rare as sweeping the Triple Crown, which has been done 11 times.

After all, he came within three-quarters of a length of sweeping the Triple Crown.

So, for the 16th straight year since Affirmed did it, nobody swept the Triple Crown.

Recent history has not been kind to horses who nearly swept the Triple Crown.

Three of his charges have swept the Canadian Triple Crown.

But, on the edge of sweeping the Triple Crown, they lost the Belmont Stakes.

He swept the Triple Crown and set two track records in doing it.

But no horse has swept the Triple Crown since Affirmed did it 21 years ago.

His father, Seattle Slew, swept the Triple Crown in 1977.

Only 11 horses in racing have swept the Triple Crown, and none since Affirmed 20 years ago.