http://cs.bloodhorse.com/blogs/horse-racing-steve-haskin/archive/2019/02/28/sir-prize-birthday-a-true-thoroughbred.aspxSir Prize Birthday competed to the age 12 making an astounding 206 starts, running at 20 different racetracks, being ridden by 52 different jockeys, and changing trainers an unbelievable 29 times.enCommunityServer 2007.1 (Build: 20917.1142)