Bred by J. B. Ewing of Roseville, Illinois and foaled in 1902, Minor Heir was by Heir-at-Law out of Kitty Clover. He was not broken until a two-year-old, and was first used by Ewing as a delivery horse. He then was sent to D. Patten for training and paced in 2:14 1/2. In 1907 Minor Heir was sent to Charles Dean, who later sold him to P. C. Isaacs of Johnstown, Pennsylvania. His fastest mile that season was 2:08 3/4. The next year he paced in 2:01 at Terre Haute and later in 1908 he paced in 1:59 1/2. In 1909, he was sold to M. W. Savage for $45,000 and put in training with Harry Hersey. Minor Heir's best time was recorded September 16, 1910 at Indianapolis at 1:58 1/2. He was retired from racing after 1912 and died March 24, 1928 at the farm of W. C. Crawford, Williston, Tennessee.
Published in the Harness Racing Museum's 1994 book, The Immortals