Unraced Sires

Just noticed another of my old posts, addressing the issue of unraced sires (particularly, sons of Storm Cat).  Coincidentally, I saw the following article on Bloodhorse today: http://www.bloodhorse.com/horse-racing/articles/215550/unraced-stellar-rain-gets-his-first-winner  I'm hopeful that I can do some research and provide some real analysis on the topic sometime soon.