Many in secretariat's bloodline were undefeated and it seems all of the great race horses of today can be traced through pocahantas, then through eclipse....all the way to Hautboy, the byerly turk, the goldolphin arabian, and the darley arabian.
Something interesting happens when sampson's not fully throughbred bloodline shows up and the horses get stronger and larger.
Secretariat was a long time coming and has the horses mentioned above crossed many times in his bloodline.
If jockeys are not athletes, then why do the same guys win the majority of the races?
Surely, the jockey is just a passenger......LOL