Trainer Roger Attfield made a lasting impression when he spoke during his induction into the National Museum of Racing and Hall of Fame at Saratoga Springs, N.Y., in 2012. He used the occasion to make a heartfelt plea in behalf of the sport that means everything to him.

“The best horse should be able to win,” he told those in attendance. “We’ve got to clean up some of the stuff going on out there and get rid of the rubbish. You only need two or three bad apples to spoil the basket.”

Once upon a time, a long time ago, there were Thoroughbreds that could carry heavy weight assignments, set multiple track records, run 16 to 20 times a year … then come back the next year, and the next year, and do it all again.

In the modern world of horse racing – an era in which the connections of champion racehorses carefully pick their spots and rarely race more often than once a month – it can be incredible to reflect on the careers of true “iron horses” like Discovery.