AND ChatGPT says:
"In harness racing, the most notable example of a sire who was considered
average at stud but became a great broodmare sire is Volomite.
Volomite had only modest success as a sire of racehorses, but his daughters proved to be exceptional broodmares, making him a major influence on the breed and a renowned maternal sire in the Standardbred world. His impact is a classic case in harness racing of a stallion's legacy being primarily established through the success of his female progeny. "