Mark-Ye-Well was out of Mar-Kell, Calumet's excellent racing mare who was the 1943 American Champion Older Female Horse.

Trained by the father and son team of Ben and Jimmy Jones, Mark-Ye-Well was ridden by Eddie Arcaro in most of his major races.

Triple Crown races, but by mid-year he had developed into one of the top runners in his age group in the United States.

In July, he recorded a five-length win in the Arlington Classic, which was reportedly the most valuable three-year-old race ever run.

[3] The Calumet colt seemed on the way to winning divisional honors at least, but at Belmont in September he was decisively beaten by Tom Fool in the Jerome Handicap.