They keep looking for the signs; signs that the remarkable feats Justify has been pulling off are starting to take their toll. Logic says they should, because when a horse who is still just baby is asked to pack five races into about a 90-day span — including two of the toughest tests in his sport — at some point fatigue should start to make itself known.

Jose Ortiz, on a fast track to superstardom at age 24 after winning his first Eclipse Award as North America’s outstanding jockey, is taking followers of America’s Best Racing along for the ride this year by writing a diary with Tom Pedulla.